To use these add-ons, you'll need to download Firefox.

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Iceggiren i Profile Switcher for Firefox

Profile Switcher for Firefox sɣur nulldev

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Icegger-it Aseqdac Firefox 17980893
sɣur Aseqdac Firefox 17980893, för 2 år sedan
I followed the instructions but in the end the switcher didn't work (Ubuntu 22.04).