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wót thisismyaccount dnja Sept. 28, 2020 · trajny wótkaz

I too was looking for a replacement for Signature Switch (it hasn't been updated since 2019 and won't work with new versions of Thunderbird). I found this addon to be useful but it requires manually adding a signature to each email so, while it lets you choose between several sig files, it isn't as handy as SigSwitch. If the author can make it automatically insert the sig then it will get 5 stars. But it does work. You just have to look for the Kanji character that is at the right end of the font choices to access your sigs.