[zirror]

Just FYI, Firefox reader mode does the same thing. It's a little button in the address bar.

[FergusArgyll]

Reading mode in chrome does this too. Although the tts sounds like it's far behind sota

[trenchpilgrim]

Probably because it needs to run locally on older CPUs, so it's likely using an old-school phonemizer that will run on a 15 year old computer.