pdf filles are not opening

Hello, Heres how to get PDFS opening again. Go to setting (3 bars) > options > applications. Under applications panel. Find Portable Document Format (PDF) in the list and click on it to select it. Click on the drop-down arrow in the Action column for the above entry and select Use PDF reader name (in Firefox) or preview in firefox. If PDF files are still downloaded instead of displayed, try these solutions Reset download actions Open your profile folder: Click the menu buttonNew Fx Menu, click helpHelp-29and select Troubleshooting Information. The Troubleshooting Information tab will open. Under the Application Basics section, click on Show Folder. A window with your profile files will open. Click the menu buttonNew Fx Menuand then click Exit Close 29 Delete the mimetypes.rdf file, then restart Firefox. credits(https://support.mozilla.org/en-US/questions/1039902#:~:text=Go%20to%20setting%20(3%20bars,Firefox)%20or%20preview%20in%20firefox.)