Komunitné fórum Firefox

I used to have no problem opening messages.google.com/web/conversations to link my messages to my Pixel phone. Just recently the site will not open in Firefox. Not an error message, it just won't open the page.

I was on a teams meeting because I wanted to do a study session with someone on another country. As part of the homework I needed to do, I needed to listen to some audio. I changed my windows audio devices to output through the Communications device for the headset. Then I played the audio on a tab. The audio played for a few seconds before stopping again.

I understand that this is behaviour intended to let you take a call or meeting without having to manually pause any open tabs you might not have at hand, but I would like Firefox to understand I really want that audio to play without thinking it knows better. Is there any way to disable this behavior?

I used to (not long ago) convert jpg images into pdf, which works well for various applications. I am having a glitch in making the conversion now. My Firefox version is 123.0.1. Is there a reasonable workaround?