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All of a sudden, when I try to write, reply or forward msg, the msg window is empty and I can not see any entry of typing.

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When I turned on my computer this morning all was normal. Then after using Firefox email a while I tried to respond to another email. When I hit the Respond button the respond screen did not contain the email text I was responding to. It also did not show the cursor. I tried several things including searching the help files all to no avail. So I tried to write a message. Same indication so I tried to type some data. Nothing showed on the screen so I sent it to my self. When I received the note, the text I had tyoed appeared and it looked normal. So then I tried to Reply to the same message. While in Reply mode, the email portion of the screen was blank so I typed some additional text, still invisible, and sent it. Upon receive of the message all the new text was there. Same thing happens when I try to forward a message. All data is invisible in the Forward screen but anything I type into the message is present when I receive the message.

When I turned on my computer this morning all was normal. Then after using Firefox email a while I tried to respond to another email. When I hit the Respond button the respond screen did not contain the email text I was responding to. It also did not show the cursor. I tried several things including searching the help files all to no avail. So I tried to write a message. Same indication so I tried to type some data. Nothing showed on the screen so I sent it to my self. When I received the note, the text I had tyoed appeared and it looked normal. So then I tried to Reply to the same message. While in Reply mode, the email portion of the screen was blank so I typed some additional text, still invisible, and sent it. Upon receive of the message all the new text was there. Same thing happens when I try to forward a message. All data is invisible in the Forward screen but anything I type into the message is present when I receive the message.

Chosen solution

Thank you for the quick note and suggestion. I will save it for 'next time' if it comes back. Before your note came I tried something.

A little while ago I tried something. I ran the free version of Malwarebytes Anti Malware and found 79 'threats'. They were a lot of; Pup.Optional.Wajam.A, Pup.Optional.CrossRider.A, etc. Several more with different names after the Pup.Optional......... I quarantined them and retested the Reply and Forward functions. They now work as they are supposed to. So It looks like the problem was caused by these un wanted Malware items. All were in the Thunderbird library.

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Many site issues can be caused by corrupt cookies or cache.

  • Clear the Cache

How to clear the Firefox cache {web link}

and

  • Remove Cookies

This will log you out of all sites you're logged in to. Press the Alt or F10 key to bring up the tool bar. Followed by;

Windows; Tools > Options Linux; Edit > Preferences Mac; application name > Preferences

Then Privacy. Under History, select Firefox will Use Custom Settings. There is a button on the right side called Show Cookies.

If there is still a problem, Start Firefox in Safe Mode {web link} While you are in safe mode; Press the Alt or F10 key to bring up the tool bar. Followed by;

Windows; Tools > Options Linux; Edit > Preferences Mac; application name > Preferences

Then Advanced > General. Look for and turn off Use Hardware Acceleration.

Poke around safe web sites. Are there any problems?. Then restart.

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Chosen Solution

Thank you for the quick note and suggestion. I will save it for 'next time' if it comes back. Before your note came I tried something.

A little while ago I tried something. I ran the free version of Malwarebytes Anti Malware and found 79 'threats'. They were a lot of; Pup.Optional.Wajam.A, Pup.Optional.CrossRider.A, etc. Several more with different names after the Pup.Optional......... I quarantined them and retested the Reply and Forward functions. They now work as they are supposed to. So It looks like the problem was caused by these un wanted Malware items. All were in the Thunderbird library.

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I need to delete this reply. It got started in error.

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I will lock this thread so that further posts here aren't possible.