Firefox-Tweaks
Everything needs to be done in about:config. Just type that into the URL-bar of Firefox and hit it.
Set fullscreen of videos and webpages only to the size of the actual window (F11).
Pretty handy if you do have tiled windows and want a big view, but not the whole screen and pip doesn't do it for you.
Set full-screen-api.ignore-widgets to True.
Turn off Ads for Mozilla's extras in the options:
browser.preferences.moreFromMozilla to False
widget.non-native-theme.scrollbar.size.override
Edit it to whatever size you want your scrollbar to be.
widget.non-native-theme.scrollbar.style
Change the scrollbarshape. Set it to 4 for a nice chonk rectangle.
Finally, turn on "Always show scrollbars" in the normal settings window about:preferences if you want them always on.
If you also want a more dense toolbar/topbar on Firefox-based browser you should set browser.density browser.uidensity1.
Somehow the most dense option isn't shown in newer versions of Firefox.
Also the option got renamed in Firefox 121.0.1.
It also seems Mozilla has hidden the ability to add custom search engines, here's the trick:
Set browser.urlbar.update2.engineAliasRefresh to true, then the ability just pops right up.
I have no idea why Mozilla has removed this option in favor of having to use the AddOn-system, which just doesn't fell right.
To disable automatic translation popups use these settings:
browser.translations.automaticallyPopup=false
browser.translations.enabled=false
Scrollbarsource: https://artemis.sh/2023/10/12/scrollbars.html
Tags: firefox, advertising, fullscren, scrollbar, mozilla, search