Setting the scrollbar color for sidebars via userChrome.css no longer works.
STR:
1. set toolkit.legacyUserProfileCustomizations.stylesheets to true
2. apply the following CSS
3. restart Firefox
4. open a sidebar
```
:root {
scrollbar-color: #33CCFF #f2f2f2 !important;
}
```
Pushlog: https://hg-edge.mozilla.org/mozilla-central/pushloghtml?fromchange=bba8b54545d17d0a940a38bc4bb8877c4b04e7bb&tochange=7d880ff29269122bc521b3f69a643a3b7158a8eb
Unfortunately, due to bug 1959047 I cannot bisect further.
:emilio, there have been a few changes in that area that you have implemented. Maybe you could have a look?
Bug 1985558 Comment 0 Edit History
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Setting the scrollbar color for sidebars via userChrome.css no longer works.
STR:
1. set toolkit.legacyUserProfileCustomizations.stylesheets to true
2. apply the following CSS
3. restart Firefox
4. open a sidebar
```
:root {
scrollbar-color: #33CCFF #f2f2f2 !important;
}
```
Pushlog: https://hg-edge.mozilla.org/mozilla-central/pushloghtml?fromchange=bba8b54545d17d0a940a38bc4bb8877c4b04e7bb&tochange=7d880ff29269122bc521b3f69a643a3b7158a8eb
Unfortunately, due to bug 1959047 I cannot bisect further.
:emilio, there have been a few changes in the scrollbar area that you have implemented. Maybe you could have a look?