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Popup window when clicking into URL

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For the past few weeks when I click into the URL address bar, I get a popup window covering the entire Firefox window (see screenshot). This is really annoying, as I have to escape out of this to get back to the window. It makes more sense just to place the cursor in the URL. Is there a way to disable this? Or is this a bug? Or is it a problem in my installation? I'm running Firefox 133.0 (64-bit). Thank you.

For the past few weeks when I click into the URL address bar, I get a popup window covering the entire Firefox window (see screenshot). This is really annoying, as I have to escape out of this to get back to the window. It makes more sense just to place the cursor in the URL. Is there a way to disable this? Or is this a bug? Or is it a problem in my installation? I'm running Firefox 133.0 (64-bit). Thank you.
Attached screenshots

Chosen solution

(A) fixed it, thanks! I have rules added to userChrome to color tabs according to different URL domains.

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All Replies (3)

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Popups when clicking a URL could be caused by browser settings or extensions—check and adjust accordingly.

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Sorry, you probably are using a userChrome.css file with some rules dating back to the Firefox 75 days to prevent the address bar from popping out when you click in it. Firefox 133 is no longer compatible with the old code (as you can see). You can either:

(A) Delete the code blocks that have [breakout-extend] on the first line (for example, code blocks like #urlbar[breakout][breakout-extend]{rules})

or

(B) Update/replace those old rules with new rules that works for Firefox 133+

Note that the new pop-out is less dramatic than the old one, so (A) is probably good enough for most people.

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Chosen Solution

(A) fixed it, thanks! I have rules added to userChrome to color tabs according to different URL domains.

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