Hi Reiner, thanks for taking the time to write a review. I'm sorry the extension doesn't work reliably for you!
To better understand the issue, would you mind providing some additional information?
It would be great to know about - example websites where the toolbar did not appear for you reliably, - if there are any other plugins you are using (which might potentially conflict), - and the version of your firefox browser.
Feel free to share the information here or reach out via email to contact@mark-my-word.app.
