Excellent, but now flawed. Rated 4 out of 5 stars

This has gone from being a favourite add-on to being a major irritation.

Seemingly since the latest Firefox release the otpion to check only appears for the first use when the browser is opened - and then fails to appear.

To make it reappear, the browser has to be closed and opened again.

Any chance of a fix soon, please?

PS. Still 4 stars because it's excellent when it's working!