errorString - how to change the border thickness

Similar Questions

• How to change the border style of the list items in the apex

  
  Hi all

  We have created a few items from the selection list in the Apex and ask users to make changes to the border.

  I tried many ways, but he was not able to make changes, some could help me how we can change the border style of list items in Apex. By, the approach has been used by us

  Attributes of the element in the HTML form -> style = "" border: 1px solid #E5E4E2; "" [I speak that way] but no luck.

  Kind regards

  Sheikh tayeb.

  SruthiTamiri wrote:

  Hello

  Please find the details below

  APEX version # 3.2

  Internet Explorer version #7

  Mozilla version 12.0.

  Used theme #Blue

  Topic identification number is #12

  It is not possible to change the appearance of the borders of the selection list in IE7.

  To the borders of all the elements of the selection list style on a page in other browsers, include the following style sheet in the HTML Header page:

  .formlayout select {
    border: 1px solid #E5E4E2;
  }
  

  APEX 3.2 is no longer supported, and IE7 is obsolete. Upgrade to the current version is recommended.

• How to change the border against zero using javascript?

  Hello

  guys im quite new to adobe live cycle designer es2 I have a really easy.

  How can I change the hour or the appearance of a solid against zero TextBox after pressing a button

  I tried this on the FTT even click a button but seems to not work.

  NumericField1 [0] .border = 'None ';

  any suggestions? would be appreciated a youn noob.

  Hello

  The problem in your form was that it has been defined as static form.

  You must do the following to make the script work.

  (1) file menu Goto-> properties of the form and select the default values tab change the default rendering in dynamic XML form Format

  (2) select the Preview Tab. Set the type of overview as a form 'Interactive form' and preview Adobe XML dynamic XML form

  (3) Finally, while saving the PDF select Save As Type 'Adobe Dynamic XML Form.

  I corrected the form and is available at the link below.

  https://Acrobat.com/#d=R7qmed71zsu744V0Qvddvg

  Also try to give unique names to controls that are not related to each other.

  Thank you

  Srini

• change the border color of an image control

  Hi all

  I shows 30 photos on the façade by using an image control. I want the user to select 12 peaks of 30 photos.

  is there an interactive way to show what image has been selected. I thought that it would be OK to change the color of the border of the control.

  I would like to know how to change the border color of th and you are really welcome if you have a better way to say what peak has been selected.

  Thank you

  Ritesh

  Hi Ritesh,

  in my LV7.1 installation I could change bordercolor using the tool to color in development mode, but I couldn't find a property to change the colors by programming...

  So my advice would be to put a little bigger Boolean flags (or color boxes) behind the indicators of the photo. When the image is clicked/selected just change you the color of the underlying Boolean value. In this way imitate you the colorchanging of an indicator of the photo border...

• How can change the end of thick disk when a virtual machine has been placed on the disk?

  After you have moved the virtual computer to another stage, chose the thin disk bad. Now, the virtual machine cannot start. the error message says that it must be thick for clustering. So, I need to change it back if possible. Then I moved it back and thick chosed. But, after that, I got a same error. So, after you move, the atatuse disk was not be changed. Is it a way not both directions? How can change the staus thin to thick?

  Thank you!

  George

  Hello George,.

  You can also convert virtual disks in eagerzeroedthick from the command line.

  vmkfstools-j VMname.vmdk allows to convert a thin disk in eagerzeroedthick

  vmkfstools k VMname.vmdk that will do it on a thick disk

  It can also work for a thin disk, click with the right button on the vmdk in browser data store, and then click 'inflate '.

  André

• How to change the property 'Border' of a Radio button?

  How to change the property 'Border' of a Radio button?

  TIA,

  -RFH

  What is the point of an option button if you can't see if it is checked or not?

  If you want a tool of indirect approach I suggest you use another thing. Maybe an annotation.

• How to change the length of the border?

  On my picture, I want to be a top full border, no border bottom and two side borders that go only to half way down.

  I know how to add the border, but I can't seem to be able to make the borders side down at halfway.

  Is this possible?

  Thank you! (:

  A length of the border is to be determined by the element box or block encompassing level and in this case the width and height of the picture. Then no. However, you can use photoshop to add borders or add another div or any other element or a tag that is half the size of the photo and apply the border. Then position them accordingly.

• How to change the style of picture frame

  I would like to know how to change the style of table on the front. For the example below, I would like to remove the covered framework of gray color.

  I could not find the table style editor.

  

  First option: use the table on the classic controls palette, which has no border.

  Second option-

  1. Select the painting tool.
  2. Right click on the border.
  3. With open color dialog box, click the space bar. This toggles the color picker to work on color FG, the background color, or both. It is also described at the bottom of the color picker.
  4. When the two have been selected, you can make the frame completely transparent by selecting the color of T.

• How to change the Spry CSS tab

  I like to use these old screens provided with the former DW Spry tab.  I just looked in DW CC and it looks like they aren't there and more.  But anyway, I made one for my client.  Now, they want to get one of the tabs on the far right of the margin.  See the image below:

  

  I don't know yet if it's possible to do and if someone has done this before, can you tell me what code I need to change in the CSS?  I would have joined the CSS file, but it seems that you cannot attach files in this forum, so I've copied below.

  Please offer any means to change the color of the tabs, etc. - I just need to know how - or at all - this tab can be moved to the right.

  Thanks, Guy deaf

  PS I'm sorry that the CSS code does not correctly appear in this forum.  When I type this message, looks like it will display line-by-line, but it's not.  I'm sorry.

  ---------------------------------------------

  @charset "UTF-8";
  
  
  /* SpryTabbedPanels.css - version 0.6 - Spry Pre-Release 1.6.1 */
  
  
  /* Copyright (c) 2006. Adobe Systems Incorporated. All rights reserved. */
  
  
  /* Horizontal Tabbed Panels
   *
   * The default style for a TabbedPanels widget places all tab buttons
   * (left aligned) above the content panel.
   */
  
  
  /* This is the selector for the main TabbedPanels container. For our
   * default style, this container does not contribute anything visually,
   * but it is floated left to make sure that any floating or clearing done
   * with any of its child elements are contained completely within the
   * TabbedPanels container, to minimize any impact or undesireable
   * interaction with other floated elements on the page that may be used
   * for layout.
   *
   * If you want to constrain the width of the TabbedPanels widget, set a
   * width on the TabbedPanels container. By default, the TabbedPanels widget
   * expands horizontally to fill up available space.
   *
   * The name of the class ("TabbedPanels") used in this selector is not
   * necessary to make the widget function. You can use any class name you
   * want to style the TabbedPanels container.
   */
  .TabbedPanels {
    overflow: hidden;
    margin: 0px;
    padding: 0px;
    clear: none;
    width: 100%; /* IE Hack to force proper layout when preceded by a paragraph. (hasLayout Bug)*/
  }
  
  
  /* This is the selector for the TabGroup. The TabGroup container houses
   * all of the tab buttons for each tabbed panel in the widget. This container
   * does not contribute anything visually to the look of the widget for our
   * default style.
   *
   * The name of the class ("TabbedPanelsTabGroup") used in this selector is not
   * necessary to make the widget function. You can use any class name you
   * want to style the TabGroup container.
   */
  .TabbedPanelsTabGroup {
    margin: 0px;
    padding: 0px;
  }
  
  
  /* This is the selector for the TabbedPanelsTab. This container houses
   * the title for the panel. This is also the tab "button" that the user clicks
   * on to activate the corresponding content panel so that it appears on top
   * of the other tabbed panels contained in the widget.
   *
   * For our default style, each tab is positioned relatively 1 pixel down from
   * where it wold normally render. This allows each tab to overlap the content
   * panel that renders below it. Each tab is rendered with a 1 pixel bottom
   * border that has a color that matches the top border of the current content
   * panel. This gives the appearance that the tab is being drawn behind the
   * content panel.
   *
   * The name of the class ("TabbedPanelsTab") used in this selector is not
   * necessary to make the widget function. You can use any class name you want
   * to style this tab container.
   */
  .TabbedPanelsTab {
    position: relative;
    top: 1px;
    float: left;
    padding: 5px 20px;
    margin: 0px 1px 0px 0px;
    font: bold 12px sans-serif;
    background-color: #f1c185;
    list-style: none;
    border-left: solid 1px #CCC;
    border-bottom: solid 1px #999;
    border-top: solid 1px #999;
    border-right: solid 1px #999;
    border-radius: 5px 5px 0px 0px;
    -moz-user-select: none;
    -khtml-user-select: none;
    cursor: pointer;
  }
  
  
  /* This selector is an example of how to change the appearnce of a tab button
   * container as the mouse enters it. The class "TabbedPanelsTabHover" is
   * programatically added and removed from the tab element as the mouse enters
   * and exits the container.
   */
  .TabbedPanelsTabHover {
    background-color: #ffd197;
  }
  
  
  /* This selector is an example of how to change the appearance of a tab button
   * container after the user has clicked on it to activate a content panel.
   * The class "TabbedPanelsTabSelected" is programatically added and removed
   * from the tab element as the user clicks on the tab button containers in
   * the widget.
   *
   * As mentioned above, for our default style, tab buttons are positioned
   * 1 pixel down from where it would normally render. When the tab button is
   * selected, we change its bottom border to match the background color of the
   * content panel so that it looks like the tab is part of the content panel.
   */
  .TabbedPanelsTabSelected {
    background-color: #ffe9cd;
    border-bottom: 1px solid #EEE;
  }
  
  
  /* This selector is an example of how to make a link inside of a tab button
   * look like normal text. Users may want to use links inside of a tab button
   * so that when it gets focus, the text *inside* the tab button gets a focus
   * ring around it, instead of the focus ring around the entire tab.
   */
  .TabbedPanelsTab a {
    color: black;
    text-decoration: none;
  }
  
  
  /* This is the selector for the ContentGroup. The ContentGroup container houses
   * all of the content panels for each tabbed panel in the widget. For our
   * default style, this container provides the background color and borders that
   * surround the content.
   *
   * The name of the class ("TabbedPanelsContentGroup") used in this selector is
   * not necessary to make the widget function. You can use any class name you
   * want to style the ContentGroup container.
   */
  .TabbedPanelsContentGroup {
    clear: both;
    border-top: solid 1px #999;
    background-color: #FFF;
  }
  
  
  /* This is the selector for the Content panel. The Content panel holds the
   * content for a single tabbed panel. For our default style, this container
   * provides some padding, so that the content is not pushed up against the
   * widget borders.
   *
   * The name of the class ("TabbedPanelsContent") used in this selector is
   * not necessary to make the widget function. You can use any class name you
   * want to style the Content container.
   */
  .TabbedPanelsContent {
    overflow: hidden;
    padding: 4px;
  }
  
  
  /* This selector is an example of how to change the appearnce of the currently
   * active container panel. The class "TabbedPanelsContentVisible" is
   * programatically added and removed from the content element as the panel
   * is activated/deactivated.
   */
  .TabbedPanelsContentVisible {
  }
  
  
  /* Vertical Tabbed Panels
   *
   * The following rules override some of the default rules above so that the
   * TabbedPanels widget renders with its tab buttons along the left side of
   * the currently active content panel.
   *
   * With the rules defined below, the only change that will have to be made
   * to switch a horizontal tabbed panels widget to a vertical tabbed panels
   * widget, is to use the "VTabbedPanels" class on the top-level widget
   * container element, instead of "TabbedPanels".
   */
  
  
  .VTabbedPanels {
    overflow: hidden;
    zoom: 1;
  }
  
  
  /* This selector floats the TabGroup so that the tab buttons it contains
   * render to the left of the active content panel. A border is drawn around
   * the group container to make it look like a list container.
   */
  .VTabbedPanels .TabbedPanelsTabGroup {
    float: left;
    width: 10em;
    height: 20em;
    background-color: #EEE;
    position: relative;
    border-top: solid 1px #999;
    border-right: solid 1px #999;
    border-left: solid 1px #CCC;
    border-bottom: solid 1px #CCC;
  }
  
  
  /* This selector disables the float property that is placed on each tab button
   * by the default TabbedPanelsTab selector rule above. It also draws a bottom
   * border for the tab. The tab button will get its left and right border from
   * the TabGroup, and its top border from the TabGroup or tab button above it.
   */
  .VTabbedPanels .TabbedPanelsTab {
    float: none;
    margin: 0px;
    border-top: none;
    border-left: none;
    border-right: none;
  }
  
  
  /* This selector disables the float property that is placed on each tab button
   * by the default TabbedPanelsTab selector rule above. It also draws a bottom
   * border for the tab. The tab button will get its left and right border from
   * the TabGroup, and its top border from the TabGroup or tab button above it.
   */
  .VTabbedPanels .TabbedPanelsTabSelected {
    background-color: #EEE;
    border-bottom: solid 1px #999;
  }
  
  
  /* This selector floats the content panels for the widget so that they
   * render to the right of the tabbed buttons.
   */
  .VTabbedPanels .TabbedPanelsContentGroup {
    clear: none;
    float: left;
    padding: 0px;
    width: 30em;
    height: 20em;
  }
  
  
  /* Styles for Printing */
  @media print {
  .TabbedPanels {
    overflow: visible !important;
  }
  .TabbedPanelsContentGroup {
    display: block !important;
    overflow: visible !important;
    height: auto !important;
  }
  .TabbedPanelsContent {
    overflow: visible !important;
    display: block !important;
    clear:both !important;
  }
  .TabbedPanelsTab {
    overflow: visible !important;
    display: block !important;
    clear:both !important;
  }
  }
  

  !-[CodeBlockStart:dffe5525-a787-4a98-a87f-f24554b12141]-->@charset 'UTF-8'; / * SpryTabbedPanels.css - 0.6 - pre-release Spry 1.6.1 version * / / * Copyright (c) 2006] Adobe Systems Incorporated. All rights reserved. * / / * Horizontal tabbed panels * the default style for a TabbedPanels widget puts all the tab buttons * (stalled left) above the content panel. * / / * This is the selector for the main container of TabbedPanels. For our * style by default, this container does not contribute anything visually, * but it is floated to the left to ensure that all floating or compensation done * with any which of her children the elements lie entirely within the limits the * TabbedPanels container, in order to minimize any impact or unwanted * interaction with other floating elements on the page which may be used * for page layout. * If you want to limit the width of the widget TabbedPanels, define a * width of the container TabbedPanels. By default, the widget TabbedPanels * extends horizontally to fill the available space. * The name of the class ("TabbedPanels") used in this selector is not * necessary to make the widget service. You can use a class name, you * want to style the TabbedPanels container. */ . TabbedPanels {overflow: hidden;}   margin: 0px;   padding: 0px;   Clear: none;   Width: 100%; / * Hack IE to force the layout correct when preceded by a paragraph. (hasLayout bug) * /} / * this is the selector for the TabGroup. The container of TabGroup houses * all buttons on the tab for each tabs in the widget panel. This container * does not contribute to what both visually in the appearance of the widget for our * default style. * The name of the class ("TabbedPanelsTabGroup") used in this selector is not * necessary to make the widget service. You can use a class name, you * want to style the TabGroup container. */ . TabbedPanelsTabGroup {margin: 0px;}   padding: 0px; } / * This is the selector for the TabbedPanelsTab. This container houses * the title of the Panel. It is also tab 'button' that the user clicks on * to activate the corresponding content panel so that it appears on top * of the other tabs in the widget panels. * For our style by default, each tab is positioned relatively 1 pixel down from * where it would normally. This allows each tab overlap content * panel that renders underneath. Each tab is rendered with a background of 1 pixel * border which has a color that corresponds to the upper edge of the current content * panel. This gives the appearance that the tab is drawn behind the * content panel. * The name of the class ("TabbedPanelsTab") used in this selector is not * necessary to make the widget service. You can use any class name you want * to style the tab container. */ . TabbedPanelsTab {position: relative;}   Top: 1px;   float: left;   padding: 5px 20px;   margin: 0px 1px 0px 0px;   Police: bold 12px without serif.   background-color: #f1c185;   list-style: none;   border-left: 1px solid #CCC;   border-bottom: 1px solid #999;   border-top: 1px solid #999;   border-right: 1px solid #999;   border-radius: 5px 0px 5px 0px;   -moz-user-select: none;   -khtml-user-select: none;   cursor: pointer; } / * This selector is an example how to change the appearance of a button in the tab * container as the mouse enters in the it. The class is "TabbedPanelsTabHover" * programatically add and remove the element tab as the mouse between in * in and out of the container. */ . TabbedPanelsTabHover {background-color: #ffd197 ;} / * this selector is an example how to do to change the appearance of a button in the tab * container after the user has clicked on it to activate a content panel.} * The 'TabbedPanelsTabSelected' class is programmatically added and removed * the tab element as long as the user clicks button tab containers in * the widget. * As mentioned above, for our style by default, the tab buttons are positioned * 1 pixel down where he would normally. What is the tab key * selected, we change its bottom border to match the background color of the * content panel so that it looks like the tab is the content panel. */ . TabbedPanelsTabSelected {background-color: #ffe9cd;}   border-bottom: 1px solid #EEE; } / * This selector is an example of how to make a link inside a tab button * look like normal text. Users may want to use the links within a tab button * so that when it gets the focus, the text * inside * the tab button gets a focus * ring around it, instead of the ring around the whole tab. * /. TabbedPanelsTab a {color: black;}   text-decoration: none; } / * This is the selector for the ContentGroup. The ContentGroup container houses * all panels of content for each tabs in the widget panel. For our * style by default, this container provides the background color and borders that * surround content. * The name of the class ("TabbedPanelsContentGroup") used in this selector is * not necessary to make the widget function. You can use a class name, you * want to style the ContentGroup container. */ . TabbedPanelsContentGroup {clear: both;}   border-top: 1px solid #999;   background-color: #FFF; } / * This is the selector for the content panel. The content panel contains the * content for a single panel tabs. For our default style, this container * provides some padding, so that content is not pushed upward against the * widget borders. * The name of the class ("TabbedPanelsContent") used in this selector is * not necessary to make the widget function. You can use a class name, you * want to style the content container. */ . TabbedPanelsContent {overflow: hidden;}   padding: 4px; } / * This selector is an example of how to change the appearance of the currently * active panel container. The class is "TabbedPanelsContentVisible" * programatically added and removed from the content as the Panel item * is enabled/disabled. */ . TabbedPanelsContentVisible {} / * vertical tabbed panels * following rules override some of the default rules above so that the * TabbedPanels widget is rendered with its buttons on the tab on the left of * the active content panel. * With the rules defined below, the only change that will be made * to move a widget panels to horizontal tabs to vertical tabbed panels * widget, is to use the 'VTabbedPanels' class on the top-level widget * element container, instead of "TabbedPanels. */ . VTabbedPanels {overflow: hidden;}   Zoom: 1; } / * This selector floats the TabGroup so that the tab buttons it contains * make left of active content panel. A border is drawn around * the group container to make it look like a container from the list. */ . VTabbedPanels. TabbedPanelsTabGroup {float: left;}   Width: 10em;   height: 20em;   background-color: #EEE;   position: relative;   border-top: 1px solid #999;   border-right: 1px solid #999;   border-left: 1px solid #CCC;   border-bottom: 1px solid #CCC; } / * This selector disables the float property that is placed on each button of the tab * by the rule above TabbedPanelsTab default selector. He also draws a background * border for the tab. The tab button will get his left and right border of * the TabGroup and its superior border of the tab above it or button TabGroup. */ . VTabbedPanels. TabbedPanelsTab {float: none;}   margin: 0px;   border-top: none;   border-left: none;   border-right: none; } / * This selector disables the float property that is placed on each button of the tab * by the rule above TabbedPanelsTab default selector. He also draws a background * border for the tab. The tab button will get his left and right border of * the TabGroup and its superior border of the tab above it or button TabGroup. */ . VTabbedPanels. TabbedPanelsTabSelected {background-color: #EEE;}   border-bottom: 1px solid #999; } / * This selector fleet contained signs of the widget while they * make it to the right of the tabs buttons. */ . VTabbedPanels. TabbedPanelsContentGroup {clear: none;}   float: left;   padding: 0px;   Width: 30em;   height: 20em; } / * Printing styles * / @media print {.} TabbedPanels {overflow: visible! important;}. TabbedPanelsContentGroup {display: block! important;}   overflow: visible! important;   height: auto! important; } . TabbedPanelsContent {overflow: visible! important;}   display: block! important;   clear: both! important; } . TabbedPanelsTab {overflow: visible! important;}   display: block! important;   clear: both! important; } }

  Add the class like below:

• Open Ocean

Delete the following in your css spry as file its in the ' query print media "and has no effect on the screen - have added you it to the wrong place."

{.alignRight}

position: relative;

Top: 1px;

float: right! important;

padding: 5px 20px;

margin: 0px 1px 0px 0px;

Police: bold 12px without serif.

background-color: #f1c185;

list-style: none;

border-left: 1px solid #CCC;

border-bottom: 1px solid #999;

border-top: 1px solid #999;

border-right: 1px solid #999;

border-radius: 5px 0px 5px 0px;

-moz-user-select: none;

-khtml-user-select: none;

cursor: pointer;

}

Add the below css just above the press query written:

{.alignRight}

float: right! important;

}

/ * Print styles * /.

@media print {}

• How to change the color of the box

  Hello

  I want to change the color of the border of the checkbox (square shape). How can I do. I see control to change the color, but all are change fonts. I want to change the border/edge of the rectangular area that I check.

  Concerning

  Sunil

  It can be done as described here in the thread above.

  Here's a sample for you.

  https://workspaces.Acrobat.com/?d=YZazpiJgxQPoZEWtbvA-UQ

• How to change the text design AS3 using the class Date

  Hi I tried to create a 24-hour countdown on 24 who will make a loop and play back counting it self down to 00:00:00:00

  Thanks to Andrei1 for providing me with this code to create the next animtion:

  var result: String = "";
  var date: Date = new Date (null, null, null, 0, 0, 0, 24);

  var timeDisplay:TextField = new TextField();
  timeDisplay.autoSize = TextFieldAutoSize.LEFT;
  timeDisplay.multiline = timeDisplay.wordWrap = false;
  timeDisplay.border = true;
  timeDisplay.x = timeDisplay.y = 20;
  timeDisplay.text = "00:00:00 ';

  addChild (timeDisplay);

  var: timer = new Timer (250);
  timer.addEventListener (TimerEvent.TIMER, count);
  Timer.Start ();

  function countDown(e:TimerEvent):void {}
  Date = new Date (date.setTime (date.getTime () - timer.delay));
  result = date.toTimeString () replace (/ \s+GMT\-\d + /, "");
  timeDisplay.text = result;
  }

  The end result, I'm looking for is to display this countdown clock in a clear gray arial font as shown in the picture below link:

  http://img801.imageshack.us/img801/3604/picture1ms.PNG

  Right now the code I received leaves me with a box around the type and a GMT (+ 000):

  http://img534.imageshack.us/img534/4264/picture2ot.PNG

  I was wandering if any body knows how to change the design of something in the photo above simular.

  Thank you for your help in advance.

  Tom

  Snippets of code is one thing, but nothing is gained back together solutions to people without explanation (but maybe a smile to not have to struggle with it).  Learning is not easy and it is better that it isn't... it involves the effort, stadiums, an increase in capacity to win.  You presented an entirely different approach to a solution that involves techniques beyond a beginning level.

  Don't you think that tom understands what he has in his hands?  It can develop its own regular expressions or manipulate a Date object to what you gave to him?  More importantly, since he never solved the intitial design of yesterdays issues poster, which has involved basic concepts much more, don't you think he could solve this design now?  Or he missed on some basic things that must precede the techniques that you have provided learning?

• How to change the iPhone camera shutter sound 7

  How to change the iPhone camera shutter sound 7?

  Hello

  To adjust the volume of the sound of the camera shutter:

  • Use the settings ringer and alerts:
    • On iPhone 7 and iPhone 7 more, go to: settings > sounds and haptic.
    • (Other models, go to settings > sounds).
  • Or turn mute off / on using the switch on the side of your iPhone's ring/silent.
    • (The mute function is disabled in some countries).

• How to change the number of minutes for the exercise of the activity of the application

  How to change the number of minutes for the exercise of the activity of the application

  Hello

  It is not currently possible to change the goal of daily exercise.

  If you want to suggest that Apple consider adding this option, you can submit a request here:

  https://www.Apple.com/feedback/watch.html

• Our phone will make more phone calls, and we do not know how to change the settings to restore the capabilities of phoning.

  Our phone will make more phone calls, and we do not know how to change the settings to restore the capabilities of phoning.

  Greetings jenniferfrom46,

  From your post, I see that you are unable to make phone calls. I count on the ability to use my phone a lot to make calls, so I can understand your concern. I will be happy to provide you with some information for you.

  If you can not make or receive calls on your iPhone, this article goes on measures to take to help with the issue you are experiencing.

  Have a good!

• How to change the color of pre-rendered screen.

  My question is how to change the color of the page that is displayed before a site is fully charged. So let's say I go to a site where the background color is red. Before the end of Firefox loading it will appear as white. Also yes I have known that I have an add-on which changes the default color of YouTube. However the first picture comes on all websites no matter if their background is white or not.

  You can try the userChrome.css code or elegant.

  Add code to the file userChrome.css below default @namespace.

  • http://KB.mozillazine.org/userChrome.CSS

  @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */
  
  browser {background-color:#f0f0f0!important}
  

  The file userChrome.css (UI) customization and userContent.css (Web sites) are located in the folder of chrome in the Firefox profile folder.

  • http://KB.mozillazine.org/Editing_configuration

  You can use this button to go to the current Firefox profile folder:

  • Help > troubleshooting information > profile directory: see file (Linux: open the directory;) Mac: View in the Finder)
  • http://KB.mozillazine.org/Profile_folder_-_Firefox
  • Create the folder chrome (lowercase) in the .default < xxxxxxxx > profile folder if the folder does not exist
  • Use a text editor like Notepad to create a userChrome.css (new) file in the folder chrome (file name is case sensitive)
  • Paste the code in the userChrome.css file in the Editor window
  • Make sure that the userChrome.css file starts with the default @namespace line
  • Make sure that you select "All files" and not "text files" when you save the file via "save file as" in the text editor as userChrome.css.
    Otherwise, Windows can add a hidden .txt file extension and you end up with one does not not userChrome.css.txt file