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450+ extensions now available on Firefox for Android
(blog.mozilla.org)
A place to discuss the news and latest developments on the open-source browser Firefox
Curious, my Mull on GrapheneOS runs fine with extensions. I have CAD, cleanURL, and ublock enabled. I have tried Decentraleyes enabled or not enabled, both works fine on frameork's front page.
Maybe you want to disable some extensions an try again?