If so, will they re-think tiers? Or maybe they could give the option for users to choose what they need exactly and what they're willing to pay? (i.e current Proton plan that costs 8-12€ per month is too much for me, but I would gladly pay like 5€ monthly for little storage, VPN and few email aliases)

It's on GitHub, anyone can check for themselves

Haven't tried the Librewolf, because I'm satisfied with Firefox profile, but looks looks like a great alternative.

People who use chrome instead of Firefox with "betterfox" profile have no idea what they are missing out. Surfing experience is so smooth, and it's privacy friendly

That's very surprising, in a good way.

Joined because of Sync and I like it, it's easy to use, smooth and neat because it's customizable to my liking. Amazing job