Brave is free so it won’t cost you anything to delete Mozilla. They even have a very simple single button you can push to import all of your Mozilla bookmarks.
Instead of Google, use DuckDuckGo. Also, get a Protonmail account instead of gmail.
Youtube.....that’s still Google. That one is tough because neither Bitchute nor Rumble have much up yet. YouTube is also the only one that has an App for my TV. So I do still watch a lot of things on YouTube but I at least dropped by YouTube TV subscription.
Like you, I’m also still working on rooting out all the Leftist companies I do business with. It may take a little time but I will to keep going until I have good alternatives.
I use youtube as well. For the reason yu do. Bt, I use an account under a fake name and stats such messes up the targeted adverts.