Did Firefox reader mode on Linux loose its TTS feature or was it never present on Linux? It was quite useful feature on macOS but I miss it on Linux now. I guess it has something to do with Pocket.
Mine has it. I'm guessing it is checking for a library and if it exists then it shows the icon because it showed up after a few seconds.
There are about a 100 different voices that I can choose from and they all suck.
A few months ago we trained a pretty nice DNN TTS engine and I wish I had the permission to release as a free software for Linux. I feel Linux has been in need of a good TTS forever.
I think you're correct, it seems speech-dispatcher was made an optional dependency for firefox build and that Arch requires 'festival-freebsoft-utils'[1] along with 'speech-dispatcher' for narrator but the former hasn't been updated in a long time. Not sure whether that's the reason, but narrator doesn't work even after installing those packages although the speech-dispatcher gets triggered in the firewall when the reader mode is accessed.
Interestingly, this is a closed bug in Arch. Guess it's time to reopen it.
Reader mode is available (at least on FF version 85). There is a headphone icon appears on the upper left of the page and allows you to set the reading speed and choose from a bunch of different voices.
On Linux? I'm on FF 85 as well and all I see is the Font & Pocket button on the left panel in reader more and the headphone which was available on macOS is missing.