After the shit Mozilla pulled with ad/tracking this summer, the first step for improved privacy should be to delete firefox and switch to brave / what have you.
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Fun suggestion to switch to a browser that has a company behind it that has pulled a lot of shady stuff related to ads and tracking. A company where privacy is more marketing than a core value.
Edit: Since people are going to ask anyway, here is an article that covers a lot of the shady stuff brave pulled https://thelibre.news/no-really-dont-use-brave/
If you are one of those folks who don't care about the political arguments, feel free to skip over paragraph one and two. Paragraph three till ten cover actual shady stuff done by brave the company itself.
There is one more thing I can add to the list, though it wasn't as widely published about. At some point the team behind Brave decided to implement browser extension support from scratch and only support specific extensions. Which sounds okay in theory until you realize how they did so. Without involving the extension creator they would fork a version of the extension and bake that into Brave. They did so without informing the extension creator, meanwhile users would still go to the extension creator for support who couldn't fix a thing.
Every time one of these things come up, the Brave team either is irked (but changes it anyway) or goes "oh, yeah we'll remove it in the future". This to me indicates a company culture where there is no thinking ahead about the impact of features or where they simply don't care as long as they aren't called out on it.
This consistent pattern over a period of years has, to me anyway, shown that issues such as privacy or even being user centered are not a core part of their thinking but merely a marketing gimmick.
And to be ahead of the curve on some other things I have heard people say over this. Just that Mozilla sucks doesn't mean alternatives can't be worse.