Cannot resize the Firefox window under pixel 374

Using Firefox 26.0, completely new download and installation.

For various purposes, I'd like to be able to resize the entire window of Firefox on a width smaller than 374 pixel, however it no longer works. It remains simply greater than or equal to 374 pixels. Before I did the update to 26.0 this works beautifully.

Of course I can do it with web developer, but I'd rather have all the Firefox window to pixel 200 or 300 width in pixels for example.

Note that with the bookmarklet you will probably run into safety problems that Firefox does not allow a page opens as a pop-up.

You can hide all toolbars in a new window and use userChrome.css code to set a smaller width min.

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

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

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

#main-window:not([chromehidden~="toolbar"]) {min-width:200px!important;}

See line 8:

  • chrome://browser/content/browser.CSS

Tags: Firefox

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