Thank you for your feedback! We'll implement them in our upcoming releases.
To disable the blur you can turn "Power saving mode" on in the extension preferences :)

[UPDATE]

Added some features to version 0.1.5, check out the updates
- option to open in reader mode all the time - done
- dark mode for reader mode - done
- popup should remember it's position and place when user drag it somewhere. -done

We'll take a look at the other requests and get back to you about them