Recent answers to Why does Mozilla keep breaking UserCSS?https://support.mozilla.org/en-US/questions/13640332022-01-12T07:45:03-08:00Here is one big change for userChrome.css and userContent.css code in Firefox 96:
In the early Proto2022-01-12T07:45:03-08:00jscher2000https://support.mozilla.org/en-US/questions/1364033#answer-1473324<p><em>Here is one big change for userChrome.css and userContent.css code in Firefox 96:</em>
</p><p>In the early Proton days, we wrote styles with a switch so that it would only apply to the new design. However, that switch was removed, meaning your Proton code is now being ignored. To fix this, find sections like this:
</p><pre><strong>@media (-moz-proton) {</strong>
/* various code */
/* various code */
/* various code */
<strong>}</strong>
</pre>
<p><br>And take off the top and bottom lines -- <strong>@media (-moz-proton) {</strong> and the closing <strong>}</strong> -- so it looks like this:
</p><pre> /* various code */
/* various code */
/* various code */
</pre>
<p><br>If you can't find the problem in your rules, you could share them using a site like <a href="https://pastebin.com/" rel="nofollow">https://pastebin.com/</a> (you don't need to create an account, but don't lose the link to your paste that you'll need to share it).
</p>