Is it possible to make "Store as global variable" work? Right now it looks like it works, but the variable itself is always undefined.

@p-himik I'm not aware of that feature, would have to investigate, feel free to open a github issue

in general anything is possible because we have full source code to devtools

Ah, I did not know it, that's great! Sure, I'll open an issue.

but I don't promise anything, my main goal is to maintain current features and not adding new modifications if not absolutely essential

But you still accept PRs for new modifications, even through it always imposes some additional maintenance?

probably yes