Hi, I have been a grateful and happy user of TB for over a decade. Then TB updated to 115. Currently at Version 115.4.1 OS Linux 4.18.0-477.27.1.el8_8.x86_64 I posted about it taking a long time to start up when using Unified folders, and this was fixed by me doing a clean install of 115 which took me a half day. However it still takes much longer to start up than previous versions to 115. I still have the issues that I posted about: - Inbox displays incorrect number of messages - Issues with forwarded messages that also happen when using Unified folders. So I dont use Unified folders. I now also have the issues (that I have not posted about): - Sometimes TB shows an empty message with a date of year 1969 - Sometimes when I compose a new message, which opens a new window, and then I switch out of that window back to the window that has Thunderbird in it, the new message window just disappears, along with the contents I have typed into it. Poof. With TB pre-115, I always felt it was stable and reliable and had few issues over the years. With 115 I now feel there are many issues, that I dont have time to dig into, or post about. If I am using Firefox and I click "Email a link of this page" in TB, first the main TB application opens, and then a new separate window opens with a new message that contains the info of this page. In previous versions, the main TB application did not first open, just a TB new message window would open. This was much faster than what 115 does. I have a number of email accounts in TB and I cannot use Unified folders, so I have to check the Inbox and other folders of each account separately. I would install the Unified Folders Debugging 115.3 addon but I noticed it gives a warning before install that says it will have access to my whole computer, and my company's security policy will not allow installing based on this warning. To be clear, I am not posting this to request help, nor to complain about this. I am posting this because I am a grateful long term user that appreciates what Mozilla provides, but think it is important for Mozilla to know the amount of issues that some users are experiencing with 115. I use a Linux distro that lags having the latest version of TB, but I have checked the release notes of 115.4.2 and 115.4.3 and I dont see any of these issues being fixed, but I look forward to them hopefully being fixed in upcoming releases.