Yesterday we reported that our Firefox extension has some bugs in it and as such, it was not updated to version 1.2.1 along with our Chrome extension.
Make sure to first remove the previous version of our extension from Firefox before you install the new one.
— You will need to restart Firefox after you install the extension —
Please note that due to security restrictions within Firefox, clipboard actions are not supported and so we had to remove the “copy” and “paste” buttons from the extension.
We hope to have a fix for this soon.