Could use more incremental speed settings, 2x is too slow and 4x is too fast.

The pause button works! Yay!

It works good on Firefox 63.0.3. Unfortunately does not have a shortcut key and Speed not granular enough. Please add more speeds between 1X and 2X! Thank you.

Super plugin.
+ Works with additional system voices.
+ The "read out" option makes it easy to use.
- No pauses.
- No stop.