The loss of built-in PWA support was the biggest disappointment I had when switching from Chrome to Firefox, with the add-on solutions I tried having one problem or another in replicating my goal of making opening a handful of websites I had set to be PWAs look as much like regular applications as possible. While I wouldn’t switch back to Chrome in a second, and am still trying to get the rest of my family to make the switch, there’s a number of things Firefox needs to implement to remove the remaining roadblocks for people looking to make the switch away from Chrome or another Chromium browser.
Stremio comes with a few addons for content navigation by default, but to actually watch most things within Stremio itself, the unofficial Torrentio addon is needed. There’s other content addons too, but Torrentio seems to work the best.
Torrentio itself needs a debrid service API key to function, with Real-Debrid being the cheapest at about $3 a month.