From what you’ve said though there seem to be benefits from cleaning up Gecko in order to make it feasible to turn it into something similar to Electron.
The sad part is that you can’t donate to Firefox directly. Only to the Mozilla Foundation, which, I think misguidedly, is trying to become a political advocacy entity. They want to talk about “hate speech” online. They want to make their own AI thing… ugh. I would never deny that society and the internet has big problems. But it seems the organization has been overtaken by people who want to play political games rather than just making free software.
If they focused solely on making a killer browser they might actually be able to dethrown Chromium or at least become more than a niche player.
From what you’ve said though there seem to be benefits from cleaning up Gecko in order to make it feasible to turn it into something similar to Electron.