I’m currently using LibreWolf (a Firefox fork) as my primary browser, with uBlock Origin set to block scripts by default on all but a few sites. When i need to use a site that’s not one of these trusted ones and refuses to work without JS (for example, forums.linuxmint.com), is it better for my privacy to temporarily allow JS or to open the site in a different browser like FF or Vivaldi?
Does switching browsers actually make it harder to track me, especially ones that don’t have full modern CSS and JS support like Dillo, Links2, Alhena, and NetSurf?


If you’re worried about cross-site tracking, specifically, take a look at Cromite, the browser.
Going beyond Adblock, it’s stuffed with “anti fingerprinting” measures like randomizing your resolution and time, your hardware and drivers, JS execution speed, anything that could be used to try and uniquely identify your PC. It’s SOTA at that as far as I know.
Sounds like exactly what you need as a “backup browser”, as its designed to anti-fingerprint with JS enabled, neutering certain JS feature’s by default.
…But that’s just one form of privacy. If you are worried about any entity logging your visited IPs, you use a Tor browser or something like Mullad.
Mullvad* Browser