Are you talking about the 'Account Settings' window for mail account ? Is the 'Signature text' text area showing a white background? If the text box is greyed out: uncheck 'Attach the signature from a file instead'

If yes: Is 'Use html' check box selected? Are you able to left click in the white signature text box and get the flashing line text cursor to appear in the text box?

I'm using version 60.6.1 and it is working ok. What version are you using? What OS?

Do you have the same problem if you start Thunderbird in Safe Mode and then try to paste in text? 'Help' > 'Restart with addons disabled' please report back on results.

I am in account settings and HTMN is selected. The signature text box has a white background. When I left click I get the cursor and can enter type. When I right click I get absolutely nothing. The version I am using is 67.ob2 (32 bit). Somehow I got on the beta channel sometime back and didn't realize it. So I guess this is a problem with the current test version. Not certain who or how to report this. Can you either forward this for me to the beta group or tell me how to report to them? Thanks for your prompt response and help.

Forgot.. OS Windows 10 Pro Version 1803 Build 17134.706

Bugs can be reported here: https://bugzilla.mozilla.org/home

Make sure they know your OS and version of Thunderbird.

I can confirm that the context menu in the signature box doesn't appear in TB 67b2/W10. Ctrl+V to paste still works.

Thank you for your help. Appreciate your time and effort.

I think I have a similar issue, but every time I enter what I want in my signature, and click "okay", a dialog box shows and tells me an my account already exists! Try another account. That has nothing to do with my issue! How can I edit my signature, and save it without the dialog box appearing when I hit "okay"? Cheers!

BTW... I'm using Windows 10 64 bit OS.

eaglefox3 Your issue entirely different and therefore the 'Chosen solution' will not help. Please create a new question for your specific issue.

Toad-Hall said

eaglefox3 Your issue entirely different and therefore the 'Chosen solution' will not help. Please create a new question for your specific issue.

Question is posted here:

https://support.mozilla.org/en-US/questions/1270486