Firefox downloads opens PDF in LibreOffice

pdf 18.04 firefox kubuntu libreoffice

Solution 1:

I managed to fix it with kde system settings. Go to File Associations, there find pdf Application preference order. It has Okular in the top, so I first put it down, so that LibreOffice in the top, and clicked Apply. Then I placed the Okular back to the top and applied again. Now firefox picked it up.

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