check that the file is userChrome.css and not userChrome.css.txt - that happens if you have defined suffixes to be hidden.

check that the file is userChrome.css and not userChrome.css.txt - that happens if you have defined suffixes to be hidden.

Mine does not have the .txt extension.

An easy way to check is to look at profile folder to see if it shows a prefs file or a prefs.js file . Click help>troubleshootinginformation' scroll down to 'profile folder' and click 'open folder' look for prefs.js

if found, then I think there still may be an error in the userControl file. to verify, can you post a screenshot of the userChrome.css file? That may help in case the CSS needs adjusting.

Hello

According to my test, apparently, it's not working.

An easy way to check is to look at profile folder to see if it shows a prefs file or a prefs.js file . Click help>troubleshootinginformation' scroll down to 'profile folder' and click 'open folder' look for prefs.js if found, then I think there still may be an error in the userControl file. to verify, can you post a screenshot of the userChrome.css file? That may help in case the CSS needs adjusting.

I have a prefs.js file. Here's the userChrome.css screenshot

All I can surmise then, is that maybe the CSS doesn't work with that release.

All I can surmise then, is that maybe the CSS doesn't work with that release.

I tried adding some Preference config entries that didn't exist. IOW the entries from other versions that people said to modify. Nothing made a difference. I know it can be changed in vers 102.15.1 because I tried it. Guess I'll be updating TB.

Thanks for all your help.

Hello

A test.

scrollbar { width: 50px !important; }

And. Go to configuration editor https://support.mozilla.org/en-US/kb/config-editor Enter a search term toolkit.legacyUserProfileCustomizations.stylesheets Double-click on the preference, to set its value to true

And restart Thunderbird.

Thanks, That works, and only that one line of text is needed.

I know the scrollbar length varies depending how much there is to scroll through. One of my Thunderbird profiles has quite a bit to scroll through. Is there a way to make the scrollbar slightly longer, either a fixed length or perhaps just adding some pixels to it?

Thanks