I agree.
They stumbled into a political mess, it was naive and foolish but it doesn’t mean the whole of proton should be written off.
I’m not looking for an alternative. Although it is also good that people have other options to share and the freedom to move providers should they wish. I will still recommend Proton to people.
You can use “about:memory” to run a tool in Firefox to reduce memory use in a session. I’m not sure how helpful that will be.
Unfortunately the next best answer i can offer is probably “close tabs and use bookmarks” but I douht that is what you want.