Just as an FYI 'Brave' is another good (free) high security and non-tracking browser. I switched to it on my phone when Firefox (which I'd used forever) started lagging uncorrectably.
Great overall experience, small footprint, easily customizable and bug-free. Only 'semi' downside is its search engine...which sometimes seems to miss on a lot of fairly obvious results. (I find myself switching to Google for occasional searches, particularly images.)
Cheers