Does anyone have an idea of how to do it or even if it’s possible? Because as I am paranoid I would like to close my Mozilla account.
BONUS: How to prevent the installation of new extensions from opening welcome pages because it’s very annoying thank you.
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@velox_vulnus works for me between Firefox and Librewolf
It works for me. Be sure that you have selected add-ons in the sync options.
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Were Flatpaks, Snaps or AppImages involved ?
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I have no idea how sync works. On non Mozilla Firefox but it works great on normal Firefox.