
Can't open PDF Attatchments
Double-click on an attatchment or "Open" in the context-menu of an attatchment shows the file save dialog. The issue occurs with mails in the inbox. When opening a pdf attatchment from the mail-write window it doesn't do anything on double click or context menu -> open
I've tested opening an ".mp3" file from an attatchment and it worked. Opening pdf files from the file manager also works.
In the Attatchment settings the default open action is set to "Adobe Acrobat Reader" and can't be changed.
Thunderbird Version: 60.5.1 OS: Windows 7 Default PDF Application: Adobe Acrobat Reader
Chosen solution
Deleting "mimeTypes.rdf" didn't change anything, but deleting the pdf entry in Settings->Attatchment solved the issue. This solution was proposed in Attachments won't open - permanently defaulted to save attachments
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See if removing all the settings for attachment-handling actions helps. http://kb.mozillazine.org/Actions_for_attachment_file_types#Removing_all_the_settings_for_attachment-handling_actions
Chosen Solution
Deleting "mimeTypes.rdf" didn't change anything, but deleting the pdf entry in Settings->Attatchment solved the issue. This solution was proposed in Attachments won't open - permanently defaulted to save attachments