Firefox Enhanced Tracking Protection blocking HLS playback unless it's proxied
On Firefox, if Firefox Enhanced Tracking Protection is turned on, the browser will block HLS playback, even if it's enabled in Nitter's settings. There are two methods to work around this problem:

1. Turn on proxy streaming
![image](https://user-images.githubusercontent.com/52135169/105651606-5387c480-5e85-11eb-8028-493f7f99bfb8.png)

2. Disable ETP
![image](https://user-images.githubusercontent.com/52135169/105651679-8467f980-5e85-11eb-89b6-09224dc5ac03.png)

I wanted to point this out since it's been bugging me for a while, and I didn't know what's up. This probably applies to tracking protection and ad blockers on smartphones. Interestingly, uBlock Origin isn't interfering with HLS playback, so there was no need to disable it for Nitter.