I'm opening this topic because of my first experiences with Thunderbird 60.
The goal is to improve the upgrade experience for other users by collecting a list of problematic addons, compatible replacements and workarounds.
Please keep it polite and objective.
Important: Unlike in Firefox, there's no information available in Thunderbird 52, which addons are not marked compatible with Thunderbird 60 and there's no information about available alternatives.
Basically, you have to do the upgrade and find out yourself (when it's already too late)!
So be sure to have a backup of your profile before upgrading or copy your profile to an instance of Thunderbird 60 portable to test your individual configuration. Mind, that you can download mails only once if you use a POP3 setup and don't keep the mails on the server.
Also note, that the extensions.strictCompatibility is used to disable the check about the compatibility in the meta information. It will not improve the compatibility or help in any way if the addon uses commands, which aren't available in Thunderbird 60.
My personal impression: I have problems with some addons, but I can't find corresponding errors in the error console.
Addons, which were fixed by a third party person (no official release)
- AutoCopy 2 Inofficial fix, not by original author
AutoUp 1.03 Inofficial fix, not by original author
ConfirmFolderMove 1.1.2 [Properties broken] Inofficial fix, not by original addon authorNewer version for TB60 available
Display Contact Photo 1.3.1 [No photo display, properties broken] Inofficial fix, not by original addon author
FiltaQuilla 1.3.2 [Properties broken, no additional filters] Inofficial fix, not by original addon author
Mailbox Alert 0.17.0 [can't execute external commands] Inofficial fix, not by original addon authorNewer version for TB60 available
Minimize On Start and Close 1.3.2.1 [Properties broken] Inofficial fix, not by original addon author
mms Auto Correct 1.0.5 Inofficial fix, not by original addon author
OpenAttachmentByExtension 0.3.6 [Properties broken] Inofficial fix, not by original addon author
Quote Colors 0.3.1-let-fixed [Does nothing] Inofficial fix, not by original addon author
RRbuttonAndIcon 0.3.7 [No icons in status bar] Inofficial fix, not by original addon author
Search as list 3.1 Inofficieal fix, not by original addon authorNewer version for TB60 available
SearchWith 0.4.4.1 Inofficial fix, not by original addon author
Send & File Inofficial fix, not by original addon author
Unread Badge 1.2.20180408 [No display of unread count] Inofficial fix, not by original addon authorNewer version for TB60 available
Zoom Button 0.0.8 Inofficial fix, not by original addon author
- Auto Address Cleaner 1.0.4
Correct Identity 1.4.5
Display Mail User Agent 1.7.0Newer version for TB60 available
Image Zoom 0.6.3.1-signed.1-signed
Master Password+ 1.29.2 [Actually, there's an update to 1.3 for TB 60, which breaks the addon here]Newer version for TB60 available
Menu Wizard 5.10Newer version for TB60 available
MoreFunctionsForAddressBook 0.7.5
NewReturnReceiptHandler 0.4.12
Nostalgy 0.2.35Newer version for TB60 available
Quote and compose Manager
URL Link 2.04.5Newer version for TB60 available
AttachmentCount 2.3 [Coloumn empty]Newer version for TB60 available
Attachment Extractor [you could try FiltaQuilla]
Calendar Tweaks 6.3 [No effect in calendar window]Newer version for TB60 available
Change Quote and reply format [you could try ReplyWithHeader]
JunQuilla 1.0.4 [Properties broken]
MinimizeToTray Reanimated [you could try FireTray as replacement]Newer version for TB60 available
MultiBirthdaysReminder 4.3 [does nothing] [could be replaced by Card Book, if you are fine with an alternative address book]
Tonequilla [you could try Mailbox Alert]
uBlock Origin 1.13.8 [No properties, no blocking]