I am not tech savvy enough to give any more advice than this, but “wss://127.0.0.1:5939/” is a local address with the protocol WebSocket. I couldn’t find a solution, but here is someone who seems to have the same problem: https://old.reddit.com/r/LibreWolf/comments/u6dyyk/websockets/

PayPal works for me. Maybe you can find a solution here: https://librewolf.net/docs/faq/ The easiest solution would probably be to use Firefox + uBlockOrigin for banking and LibreWolf for everything else. Otherwise you can find user-made “about:config” files to harden Firefox’ security and privacy.

https://alternativeto.net/software/followthatpage/

Arch Linux, LibreWolf & KeepassXC are the first that come to mind.

Here are three options that come to mind:

If you don’t want to sell your app:

• Open-source your project. This will also allow people to review the code, add suggestions and help with programming. (IMO this is the most realistic option)

If you do want to sell your app:

• Ask your family and / or friends to test your app. Assuming they have no experience in programming, this will only test the graphical interface, user experience and find surface level bugs.

• Give beta testers incentive to test your app. Either by giving them a small cut of the revenue your app makes or just pay them a fixed amount.