Hello,

when i open a pdf file from firefox it is opened with gimp and not with okular. when i open the same pdf file from dolphin it does open as it should.

Thank you in advance to help me to resolve this issue

System information:

latest KDE neon user edition.

Firefox preferences/ general/ applications, search for "pdf". Several different pdf items are shown, but I think the one labeled "Portable Document Format (pdf)" is the significant one. Yours must be set to "gimp" which is the default. Change it to "okular".