Respostas mais recentes para Cannot open .pdfs in Firefoxhttps://support.mozilla.org/pt-PT/questions/10399022015-06-10T04:38:48-07:00Still bombs in safe mode, running the default theme. Changing hardware acceleration setting (and res2015-06-10T04:38:48-07:00jesusjoneshttps://support.mozilla.org/pt-PT/questions/1039902#answer-739378<p>Still bombs in safe mode, running the default theme. Changing hardware acceleration setting (and restarting Firefox) does nothing. Same thing happens. PDFs are set to preview in Firefox. Thanks.
</p>Isn't the internal PDF Viewer able to show PDF files as well?
You can try to disable hardware accele2015-06-07T05:38:17-07:00cor-elhttps://support.mozilla.org/pt-PT/questions/1039902#answer-738202<p>Isn't the internal PDF Viewer able to show PDF files as well?
</p><p>You can try to disable hardware acceleration in Firefox.
</p>
<ul><li>Tools &gt; Options &gt; Advanced &gt; General &gt; Browsing: "Use hardware acceleration when available"
</li></ul>
<p>You need to close and restart Firefox after toggling this setting.
</p>
<ul><li><a href="https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration" rel="nofollow">https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration</a>
</li></ul>
<p>Start Firefox in <u><a href="/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode" rel="nofollow">Safe Mode</a></u> to check if one of the extensions (Firefox/Tools &gt; Add-ons &gt; Extensions) or if hardware acceleration is causing the problem.
</p>
<ul><li>Switch to the DEFAULT theme: Firefox/Tools &gt; Add-ons &gt; Appearance
</li><li>Do NOT click the Reset button on the Safe Mode start window
</li></ul>
<ul><li><a href="https://support.mozilla.org/kb/Safe+Mode" rel="nofollow">https://support.mozilla.org/kb/Safe+Mode</a>
</li><li><a href="https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes" rel="nofollow">https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes</a>
</li></ul>Thanks for the help. Still the same. Doesn't matter if I choose preview in Firefox or Acrobat. Blank2015-06-07T04:22:39-07:00jesusjoneshttps://support.mozilla.org/pt-PT/questions/1039902#answer-738165<p>Thanks for the help. Still the same. Doesn't matter if I choose preview in Firefox or Acrobat. Blank tab opens, closes, and then it asks me to save or open. Tried changing settings on both prefs. No difference. Thanks though.
</p>You can change the action for Portable Document Format (PDF) from Preview in Firefox to use another 2015-06-07T03:10:57-07:00cor-elhttps://support.mozilla.org/pt-PT/questions/1039902#answer-738132<p>You can change the action for Portable Document Format (PDF) from Preview in Firefox to use another application like the Adobe Reader or set to Always Ask in "Firefox &gt; Options/Preferences &gt; Applications".
</p><p>You can set the pdfjs.disabled pref to true on the <b>about:config</b> page to disable the build-in PDF viewer.
</p><p>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 if you want to display PDF documents in Firefox with another application (i.e. not the built-in PDF Viewer).
</p>
<ul><li><a href="http://kb.mozillazine.org/about:config" rel="nofollow">http://kb.mozillazine.org/about:config</a>
</li></ul>Did all of this, no changes. Still opens a tab that immediately closes, and asks me to save instead.2015-06-07T02:11:02-07:00jesusjoneshttps://support.mozilla.org/pt-PT/questions/1039902#answer-738106<p>Did all of this, no changes. Still opens a tab that immediately closes, and asks me to save instead. Very frustrating. Installed Acrobat Reader, checked the settings there, no difference. Running Windows 7 Ultimate and Firefox 38.0.5. Any other potential solutions?
</p>Hey,
Try the following:
Go to setting (3 bars) > options > applications.
Under applications2015-01-05T16:12:00-08:00imoxhttps://support.mozilla.org/pt-PT/questions/1039902#answer-673803<p>Hey,
</p><p>Try the following:
</p>
<ul><li> Go to setting (3 bars) &gt; options &gt; applications.
</li><li> Under applications panel.
</li><li> Find Portable Document Format (PDF) in the list and click on it to select it.
</li><li> Click on the drop-down arrow in the Action column for the above entry and select Use PDF reader name (in Firefox) or preview in firefox.
</li></ul>
<p>If PDF files are still downloaded instead of displayed, try these solutions
Reset download actions
</p>
<ul><li> Open your profile folder:
</li></ul>
<p>Click the menu button<img class="wiki-image frameless" src="https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/gallery/images/2014-01-10-13-08-08-f52b8c.png" alt="New Fx Menu" title="">, click help<img class="wiki-image frameless" src="https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/gallery/images/2014-01-10-13-10-08-eaa722.png" alt="Help-29" title="">and select Troubleshooting Information. The Troubleshooting Information tab will open.
</p><p>Under the Application Basics section, click on Show Folder. A window with your profile files will open.
</p><p>Click the menu button<img class="wiki-image frameless" src="https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/gallery/images/2014-01-10-13-08-08-f52b8c.png" alt="New Fx Menu" title="">and then click Exit <img class="wiki-image frameless" src="https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/gallery/images/2014-03-07-11-44-35-716f6b.png" alt="Close 29" title="">
</p><p>Delete the mimetypes.rdf file.
</p><p>Then open firefox again and see.
</p><p>I hope it helps.
</p>