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How I can resized address bar (need some squeeze to smaller wide) and add more some addons icons on toolbar panel?

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Hello! Could you tell me how I can customize my firefox: resized address bar (need some squeeze to smaller wide) and add more some addons icons on toolbar panel (now placed only 5 icon, the new addons icon not placed)? Thanks!

Hello! Could you tell me how I can customize my firefox: resized address bar (need some squeeze to smaller wide) and add more some addons icons on toolbar panel (now placed only 5 icon, the new addons icon not placed)? Thanks!

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First, have you opened Customize and removed the two flexible spacers from the Navigation Toolbar?
That should add enough space for maybe 6 more toolbar buttons.

Beyond that, you can set the maximum length for the URL bar by using the optional userChrome.css file.
I use this code in userChrome.css in one of my Profiles to "lock" the URL bar to a specific length.

#urlbar-container {max-width:1050px!important}

Vary the 1050px to what suits your needs.
https://www.userchrome.org/