"thank you" page is auto opening Rated 5 out of 5 stars

Each time while firefox starts the "thank you" page is auto opening - https://addons.mozilla.org/en-US/firefox/addon/screengrab-fix-version/contribute/installed/. Firefox v=19.0.2. Screegrab v=0.97.7c .

Hello Oleksandr. Writing this in response to your query. It seems that the problem is auto solved with Firefox v 20.0.1.

This review is for a previous version of the add-on (0.97.7c.1-signed). 

OS version (linux, macOS or windows? x32 or x64?)?
Screengrab options after restart Firefox saved or resetted?