Since I don’t have to add anything to my Reddit comment, I just copy and paste my Reddit comment in here:
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UPDATE:
It makes typing very stuttery.
I first thought it’s due to my Drivers or the fact that I didn’t restart my Firefox in a little while but just now after disabling the Bitwarden Extension, I can confirm that it is the Bitwarden Extension that causes massive stutters while typing!
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9070 XT (25.10.2)
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7800x3d
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32GB RAM
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Win10, 22H2
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Firefox: 144.0.2
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Bitwarden: 2025.10.0
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The OP’s post about the exact same issue:
Firefox performance is atrocious with the Bitwarden extension