Help me understand browser isolation

Privacy and Security Get Advice
1

Hi guys,
im trying to understand to what extent are sites isolated on browsers, especially on the mobile space.

To try to limit the ammount of apps in my phone i use Hermit Browser to create what i think is called PWA. I am currently using Amazon,ChatGPT, My City weather site, My region bus and train site and a few others in Hermit.
The good thing about hermit is that it containarizes each site so i feel like im really limiting third party tracking, but Hermit is not OpenSource.

I seems that i can get the same result with just a normal browser. How much are sites isolated/sandboxed from each other within the same browser and profile (i dont think there are profiles on mobile).
If i create PWA with a browser can they see any content of another PWA or other browsing history? The latter is less of a concern since i plan on having a dedicated browser for PWAs.

Could i switch to a browser for my “apps” or should i stick with Hermit? In case should i use chromium or firefox for this. My plan was Brave for PWA and Mull for normal search.

2

Welcome @Iguana.in.Pyjama For a few months I have been using Brave for PWA and Mull for search, as well. Brave for anything I need to log into. Brave breaks for me on a lot of sights because I have hardened it following Privacy Guides. I use Mull Default settings just so I know this is a danger zone.

Here is my notes on Brave Settings which I ganked and edited from privacy guides.

I need to update that I changed “forget me when I close this site”. This is in testing as I mainly use Brave for accounts and PWA.

Brave includes some anti-fingerprinting measures in its Shields feature. We suggest configuring these options globally across all pages that you visit.

Brave shields global defaults

Shields’ options can be downgraded on a per-site basis as needed, but by default we recommend setting the following:

  • Select Aggressive under Block trackers & ads

  • Select Upgrade connections to HTTPS

  • Select Always use secure connections

  • (Optional) Select Block Scripts

  • Select Strict, may break sites under Block fingerprinting

Clear browsing data

  • Select Clear data on exit

Social Media Blocking

  • Uncheck all social media components

Other privacy settings

  • Select Disable non-proxied UDP under WebRTC IP Handling Policy

  • Uncheck Allow sites to check if you have payment methods saved

  • Uncheck IPFS Gateway

  • Select Close tabs on exit

  • Uncheck Allow privacy-preserving product analytics (P3A)

  • Uncheck Automatically send diagnostic reports

  • Uncheck Automatically send daily usage ping to Brave

Brave Sync I do not use Brave sync

Brave Sync allows your browsing data (history, bookmarks, etc.) to be accessible on all your devices without requiring an account and protects it with E2EE.