Manifest V3 is a perfect example of "great idea but terrible execution". The ability to have extension pages be suspended when not in use is great. Improving (and having finer grained) permissions is great. It should have stopped there: introduce a new "persistent" permission that extensions can request to stay around permanently, and when not requested, introduce lifecycle events so extensions can properly handle suspension/resumption. Make some tweaks to how permissions as a whole are handled.

Instead we have this abomination which is worse for everyone involved. It doesn't improve performance because it forces extension authors to hack around the broken API, and in doing so waste CPU and memory.

Firefox FTW