I've since: added CA certificate, added the nextcloud app to VPN split tunnelling and disabled block connections without VPN. Still not having any luck. How do you trust CA in Firefox beta dev option?
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Tap Kebab Menu > Settings > About Firefox and tap the Firefox icon 5 times to enable “developer mode”
Go back to Kebab Menu > Settings > Secret Settings (at the bottom), and tap Use third party CA certificates
Yep, I tried that. The only way around this was to disable nostr:npub1mea2vwcu06qf7e4x00wd902vj54qnn2jacq76ldntrgfhtvhlpqqrvqane VPN and turn off the kill switch, a suboptimal workaround... Help
If split tunneling is enabled and block connections without VPN is disabled you shouldn't need disable the whole VPN.
Make sure in Proton the split tunneling mode is set to standard and nextcloud and Firefox beta are added to the excluded apps.