Firefox 技術支援討論區

When I go to download a ZIP file, it will always attempt to download the file directly rather than letting me open it with WinRAR. When I go into the browser settings I see that some other file types have options to choose how they're handled, but there's no entry for ZIP files. I've tried refreshing my Firefox install and yet the issue still persists.

I used to have this option before I reinstalled Windows a while back (where I kept my files but not programs). I don't know for sure that that's what caused this to start, but the timing would line up.

In the past, when ICS files were in a mail, I had been asked what to do, and could open them in OUTLOOK. This option has been apparently cancelled and it only asks where to save the file, without any option to open it directly. Furthermore, when I try to modify it in the "settings" and change it to "Always ask" I can't find no ICS files nor OUTLOOK SCHEDULE files. Please advice. Thanks

Many file types are no longer listed under Settings > Applications>Content Type at about:preferences#general. I used to be able to click on a file in an email like a Word or Excel document, and it would come up on my screen. Now Firefox asks me to Save them. I don't want to automatically save files without first looking at them. How can I get those file types in the Application list again?

I have attached a pic of the file types I have left to chose from. There used to be a lot more. How can I get back all the missing choices I have had there for years?