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Files to download must be saved now and cannot be opened in Firefox. Just started 1 week ago
All pdfs or downloadable files must now be saved and cannot be opened within Firefox. No settings have changed and no new updates. Because of how frequently I need to view pdfs or open new tabs, I cannot use Firefox as my primary browser like this
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I'm sorry to read that. It could be related to the new built in PDF reader. Take a look to this article to learn more about how to troubleshoot it:
My other suggestion is to launch Firefox in Safe Mode to make sure that no add-on is interfering with the expected behavior of your browser:
Let me know if this works, Ibai
Current Firefox versions have enabled a built-in PDF Viewer that doesn't have all features that other PDF readers like the Adobe Reader have or may not function properly otherwise.
You can change the action for Portable Document Format (PDF) from Preview in Firefox to use the Adobe Reader or set to Always Ask in "Firefox > Options/Preferences > Applications".
You can set the pdfjs.disabled pref to true on the about:config page to disable the build-in PDF viewer.
You can check the value of the plugin.disable_full_page_plugin_for_types pref on the about:config page and remove the application/pdf part if present or reset the pref to the default via the right-click context menu.