Firefox does not open in full screen on the task bar and I have to go over it to see the web page.

Firefox does not open in full screen on the task bar and I have to go over it to see the web page.

Firefox window is sometimes "off screen" somehow. Often, you can force it to appear on the screen by right clicking on the thumbnail image just above the taskbar and choose expand. Does it work?

A possible cause for this is that the file that stores the positions and sizes of window is corrupt. You can delete this file and Firefox will return to standard window resizing.

#1 method: If you can get a zoomed window:

Open the settings folder (AKA Firefox profile) current Firefox help

  • button "3-bar" menu > "?" button > troubleshooting information
  • (menu bar) Help > troubleshooting information
  • type or paste everything: in the address bar and press Enter

In the first table of the page, click on the view file"" button. This should launch a new window that lists the various files and folders in Windows Explorer.

Leave this window open, switch back to Firefox and output, either:

  • "3-bar" menu button > button "power".
  • (menu bar) File > Exit

Pause while Firefox finishing its cleanup, then rename xulstore.json to something like xulstore.old. If you see a file named localstore.rdf, rename this to localstore.old.

Launch Firefox back up again. Windows normally appear again?

#2 method: If you can not get a Firefox window for all:

Close Firefox by right clicking the icon in the taskbar > close all windows.

Using the Run dialog box (windows key + R) or the start search bar menu type or paste the following and press Enter to drill down to the profiles folder:

%APPDATA%\Mozilla\Firefox\Profiles

Here you can see a folder - in this case, double-click that - or more than one case - in this case, double-click on in what looks like the most recently updated.

Scroll down and rename xulstore.json to something like xulstore.old. If you see a file named localstore.rdf, rename this to localstore.old.

Launch Firefox back up again. Windows normally appear again?

Then, to re - light bars, you can use one of the following methods to view the list of the toolbar, and then select the desired bars it:

To activate the menu bar, toolbar bookmarks or other bars, click it in the list.

Tags: Firefox

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