I created an account to specifically request this.
The read-aloud extension in Firefox is awkward because you can't use it with the reader view.
Safari uses Siri for read-aloud. I use so much that I've deleted news apps so I can listen in Safari instead of having to read the whole thing. I don't know about data collection that would come with the use of Siri.
I started trying Orion today, and am already going back to Safari.