Um actually… Opera and Edge weren’t always based on chromium!
Chrome was not always based on chromeium. Chrome was based on Apple WebKit until 2013 when they forked WebKit and made the Blink engine.
Chromium was still the base before the WebKit/Blink fork. Chrome and Chromium were released simultaneously in 2008.
Firefox with add-ons. Especially, but not only, Ublock Origin.
Add-ons are a pretty huge security risk, though. Someone was just posting an article about how tempting it is to sell out with your extension, and how many offers you actually get.
And I’ve already been burned once, and it’s not pretty. Also nothing you can do against this.
The best solution is actually not Firefox, but Mullvad. No need for extensions, based on Tor Browser and can be bundled with a VPN that’s full of other people using the same browser - so you have exactly the same fingerprint, and they can’t tell you apart. Not by extensions, not by IP.
