I'm curious what you're using currently if Firefox's privacy imperfections are of concern? Safari?

1: https://news.ycombinator.com/item?id=18608041

They will also block all third party cookies effectively blocking most ads. Chrome or Chromium would never build in such a feature and make it ON by default. Because tracking and personalized ads are there business model.

Lately it introduced the ability to do "Multi-Account Containers". They behave like light profiles. But you can use containers to box social networks. See:

1. https://addons.mozilla.org/en-US/firefox/addon/multi-account...

2. https://addons.mozilla.org/en-US/firefox/addon/facebook-cont...

3. https://addons.mozilla.org/en-US/firefox/addon/google-contai...

This ability is currently unmatched in other browsers.

It also has built-in tracker blocking. Nothing you can't get with uBlock Origin or Privacy Badger, but it's nice to have it on by default, especially in Private Mode.

Note that people complain about the "strict mode" of that tracker blocking not being enabled by default. However I can tell from my experience that the strict mode breaks websites.

See also the design of Firefox Sync, which was designed to not leak data by default, as compared with Chrome's Sync: https://hacks.mozilla.org/2018/11/firefox-sync-privacy/

Not sure relative to Safar or Edge.

Of the problems I've had with Firefox, some of them are actually due to it being _too_ privacy focused, and not having good UX explaining why common operations don't work as expected. For example I couldn't save a file onto my computer and was pulling my hair out until I did a binary search through every version of Firefox, found the first version that didn't work, read deep into the patch notes, and discovered that I needed to set the magical flag of dom.ipc.plugins.sandbox-level.