Tested on three Android devices (version 9, 13, 16) with different Firefox versions under 150 (had to modify for older).

Two boot looped, I had to enter recovery and the other just powered off [0].

The demo modifies the wallpaper on supported Pixel devices.

[0] IonStack https://rootme.nebusec.ai

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Tip: Install a Chromium flavor browser (Chromite) separate from the main browser.

Disable Javascript and hardware accelerated video decoder (commonly exploited) from the flags page and enable reader mode to fix broken JS-dependent websites when browsing blogs and random sites on your personal devices, else dedicate a tablet.