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Firefox no longer previews print on a new tab?

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It used to be like this: when u selected a file to print (for exemple: a .pdf attached in email) it opened in a new tab, with a preview. Not it seems this is not happening, and when i select it to print, it just download the file. There's a lot of files that i don't want to download, i just want them to be printed. How should i do?

I'm on macOS using firefox 85

Thank you.

It used to be like this: when u selected a file to print (for exemple: a .pdf attached in email) it opened in a new tab, with a preview. Not it seems this is not happening, and when i select it to print, it just download the file. There's a lot of files that i don't want to download, i just want them to be printed. How should i do? I'm on macOS using firefox 85 Thank you.

Chosen solution

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Chosen Solution

What version of macOS are you on?

Does this help: https://support.mozilla.org/en-US/kb/change-firefox-behavior-when-open-file

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I could change it from preferences/general/applications Thanks very much, Jonathan.