Definitely agree with this for both desktop and mobile. I think you can send articles to Pocket for reading out loud, but a built-in feature would be far better and directly supports the believe in making the web useful for everyone, promoting accessibility.
That all said, I just remembered there is this add-on, I’ve not tried it yet, but worth a go?
Yes it is good that Firefox have this feature because every time I need this functionality I have to switch to Microsoft Edge. I don't wanna leave Firefox and move other the browser. Why Firefox does not have this feature when it is already exist in the our planet Earth. Am I asking Firefox to build JST which took 25 years?