Selected the option to mark the messages as read when opened. With 45.0, this option no longer works. CAUSE: RRbuttonandIcon Add-on
Until now the Thunderbird's option to mark the messages as read once opened worked fine. With the 45.0 version all the messages remain marked as "not read", despite the option "mark messages as read once opened" is checked. My os is Windows 10 64bit. Thank you in advance.
Modified by Wayne Mery
Chosen solution
I've found out the guilty add-on. It's an old add-on: RRbuttonandIcon (https://nic-nac-project.org/~kaosmos/index-en.html). I uninstalled it. I used this add-on to get a button and icon for return request receipt. Thank you for your courtesy, Wayne.
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Does problem go away with thunderbird started in safe mode?
https://support.mozilla.org/en-US/kb/safe-mode
Thank you for your answer, Wayne. Yes the problem goes away when in safe mode. This means it depends on the addons? Thanks.
> Yes the problem goes away when in safe mode. This means it depends on the addons?
Quite possibly, yes. Please post and let us know what you find.
I'm turning off one by one the installed add-ons. I'll let you know what is creating problems.
Chosen Solution
I've found out the guilty add-on. It's an old add-on: RRbuttonandIcon (https://nic-nac-project.org/~kaosmos/index-en.html). I uninstalled it. I used this add-on to get a button and icon for return request receipt. Thank you for your courtesy, Wayne.
Modified by rasna