"When it works, it really works. When it doesn't work, it really doesn't work."

In my end, this add-on wasn't even remotely nice to use, it does everything what it says, and it does it beautifully. But because of one critical, persistent issue, troubleshooting this add-on was a literal saga filled with confusion and torment.
The issue is that it sometimes kicks me out of my session and just refuses to sign me back in and turns into a loop where I input my email address and password over and over again only to end up with an error every single time. I used different forks of Firefox and it still did the same thing, re-installing the add-on or using different Firefox profiles didn't fixed anything, forcing me to use the Web App or Windows program of Proton Pass. I don't know if it's because of my setup or the extension... Either way, this is not the normal behaviour you would expect from this add-on.