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Vertical scroll bar is WAY too small. 6px wide for no reason

  • 3 replies
  • 1 has this problem
  • 20 views
  • Last reply by kedado8389

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This just happened when I turned my computer on this morning, no idea why this changed. How do I fix it? It's so hard to see and it's incredibly annoying.

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I fixed it by clearing the startup cache in the troubleshooting information page. Thanks!

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seems to be affecting other elements on web pages. Check boxes on Craigslist for example are also extremely tiny now. I've added pictures

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Websites can modify the appearance of the scroll bar. It used to be possibly to disable this CSS property via prefs on the about:config page, but this is no longer possible. Instead you can use code in userContent.css.

You can add code to the userContent.css file.


*{scrollbar-color:auto!important; scrollbar-width:auto!important;}

It is not that difficult to create userContent.css if you have never used it.

The first step is to open the "Help -> Troubleshooting Information" page and find the button to access the profile folder.

You can find this button under the "Application Basics" section as "Profile Folder -> Open Folder". If you click this button then you open the profile folder in the Windows File Explorer. You need to create a folder with the name chrome in this folder (name is all lowercase). In the chrome folder you need to create a plain text file with the name userContent.css (name is case sensitive). In this userContent.css text file you paste the text posted.

In Windows saving the file is usually the only time things get more complicated because Windows can silently add a .txt file extension and you end up with a file named userContent.css.txt. To avoid this you need to make sure to select "All files" in the dialog to save the file in the text editor using "Save File as".

You need to close (Quit/Exit) and restart Firefox when you create or modify the userContent.css file.

See also:

In Firefox 69 and later you need to set this pref to true on the about:config page to enable userChrome.css and userContent.css in the chrome folder.

  • toolkit.legacyUserProfileCustomizations.stylesheets = true

See:

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I fixed it by clearing the startup cache in the troubleshooting information page. Thanks!

Modified by kedado8389

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