afwall

On Pixel and Nexus phones, the Google Camera app works properly if you have either microG or Google Play Services installed. If you're using microG, you'll need to install the Google Camera app manually: https://www.apkmirror.com/apk/google-inc/camera/ The camera quality and features are the same as in the stock ROM. Google Camera is proprietary, but you can disable its internet access through the app settings (in LineageOS) or a firewall like AFWall+: https://github.com/ukanth/afwall/ If you're using another camera app, then you'll lose Google Camera's optimized features. This may still be worth it if you prefer to use FOSS software.

Not sure about this but I think yes. China has network filtering software for VPNs, in fact, the more advanced anti VPN blocker tools are Chinese due to the firewall. They have several websites blocked like Google, Facebook (no OAuth integrations). Anything that involves networking might suffer. They would probably get a police visit if the firewall has triggers for sshing into a server (common in devops). Not joking: https://github.com/ukanth/afwall/issues/420#issuecomment-262... Maybe they could work but would have serious limitations I guess. In a "communist" country, don't even know if they have a tax status for freelancing given the government behaviour. The only work around would be to have a based company in China to outsource.