there used to be an addon to ‘fix’ that but i dunno if it still exists. it’s been awhile since i did a month of netflix.

drm on linux to watch commercial services like prime or netflix sucks. there is no browser or linux distribution that will give the same level of drm that a closed system’s native browser can (edge on windows, chrome on android, safari on mac/ios).

you can still watch most anything, just perhaps not with as high a quality and you may need to fudge a ua string or something.

vertical tabs have been in firefox since ~ v136.

just use firefox. tweak settings as necessary for your ‘needs’, including enabling the drm which is disabled by default by most distributions.