To use these add-ons, you'll need to download Firefox.

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Iceggiren i Custom Scrollbars

Custom Scrollbars sɣur Wesley Branton

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Icegger-it Fixtman
sɣur Fixtman, hace 5 años
Unfortunately, all I wanted it for was to change the width of the scrollbar, which it doesn't do. There currently isn't an extension that does that for FF89. Yes, I changed the colors, but of COURSE they don't work on THIS page...
The instructions to change width yourself (at least on Linux) are at: https://www.linuxquestions.org/questions/slackware-14/mozilla-firefox-89-0-x86_64-1-no-longer-applying-scrollbar-width-from-%27gtk-css%27-4175695877/
A couple simple about:config entries.

Tiririt n ineflayen

yeffeɣ-d deg hace 5 años
Unfortunately, Firefox currently has very limited support for adjusting scrollbar widths. I'd love to expand the options available for that when more options are added to Firefox.

As for customizing this page, that's a restriction Firefox has for all add-ons. There are some protected pages (such as internal browser settings pages or Mozilla-owned pages), which add-ons are not allowed to edit. The intention is to prevent add-ons from injecting false or dangerous information on the pages, but it also means that the Custom Scrollbars add-on can't modify the scrollbars on this page.
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