<p></p>
<p dir="auto">I resolved my performance issue 🎉</p>
<p dir="auto">I'm not sure about the root cause, but I managed to fix it by disabling style customization with userChrome.css (which I use to change bookmark icon in the toolbar) in <code class="notranslate">about:config</code> <code class="notranslate">toolkit.legacyUserProfileCustomizations.stylesheets</code>, then restart Firefox, and the best part is that I can re-enable it, restart, and now everything works perfectly!</p>
<p dir="auto">I never add to do this on my laptop, style customization was always enable and working, it simply fix itself in a recent update apparently but not on my computer.</p>

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