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how to remove/change printer in Important Modified Prefs; stays as default

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Old printer (Samsung, listed in my Important Modified Preferences in Troubleshooting) will not allow new printer to be Default printer. No matter what I do. I've followed the instructions here in FF Help re about:config & reset and others too. Is this something to do with FF? I've tried to find & delete the old printer all over my laptop, but it stays there like a bad penny as the default anyway. Is there a way to get rid of it by changing a code or something? Never had this problem before. I would appreciate any help you can give me. Kindest regards.

Old printer (Samsung, listed in my Important Modified Preferences in Troubleshooting) will not allow new printer to be Default printer. No matter what I do. I've followed the instructions here in FF Help re about:config & reset and others too. Is this something to do with FF? I've tried to find & delete the old printer all over my laptop, but it stays there like a bad penny as the default anyway. Is there a way to get rid of it by changing a code or something? Never had this problem before. I would appreciate any help you can give me. Kindest regards.

All Replies (5)

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Would you please give me a screen shot of your problem? May be I can help you.

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Here's a screen shot of the Samsung printer info in Troubleshooter .....Preferences. I don't know how to replace it w/ my new Canon. Samsung simply won't go away and won't let canon in. I've uninstalled & deleted it from every place I can think of. Thank you. ps: if I Refresh FF, will that help?

Endret av WilyCat

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?????

Endret av WilyCat

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Sorry for another "Reply" -- also no prefs.js -- thank you

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That dark-blue highlighted file is the prefs.js file!

Do { Ctrl + P } to open the "native print dialog" and up at the top where it says Printer > Name - select the other printer. Then proceed to printing a page from the dialog box. Now the "default" printer in Firefox is changed.