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I have a dll. attached to firefox, gmpopenh264.dll, I rebooted firefox but it is still there how do I get rid of it?

  • 9 replies
  • 81 have this problem
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  • Last reply by hpmini2009

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I think this came in on a browser package that I deleted "astromed" or something like that. now there is constant chronic pop ups. I tried to manually remove the folder but I can't get the permissions to change to delete it

Chosen solution

They are part of the current Firefox setup as you can read in the blog post.

You can disable the OpenH264 plugin in "Firefox/Tools > Add-ons > Plugins" if you like.

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Where is the DLL file located?

The "h264" in the name implies some kind of video-decoding functionality, in case that helps in identifying the software to which it belongs.

Generally speaking, I suggest the following process for cleaning up unwanted software:

Open the Windows Control Panel, Uninstall a Program. Click the "Installed on" column heading to group the infections, I mean, additions, by date. This can help in smoking out undisclosed bundle items that snuck in with some software you agreed to install. Take out as much trash as possible here.

Then, in Firefox, open the Add-ons page using either:

  • Ctrl+Shift+a
  • "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Plugins. Set nonessential and unrecognized plugins to "Never Activate".

In the left column, click Extensions. Then, if in doubt, disable (or Remove, if possible) unrecognized and unwanted extensions.

Often a link will appear above at least one disabled extension to restart Firefox. You can complete your work on the tab and click one of the links as the last step.

Finally, you can "mop up" remaining issues with the scanning/cleaning tools listed in our support article: Troubleshoot Firefox issues caused by malware.

Are you able to get rid of the unwanted DLL?

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looks like this Dll. is part of a package mozilla and cisco are working on I added a popup blocker and maybe I'm fine, I did agree to a high def program, ran one tv program and then deleted program however this dll. is still hanging on it is in a hidden file; appdata/roaming/mozilla/firefox/profiles/k6ggrl7s.default-1413326062236/gmp-gmppopenh264/1.1.

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Sound like a Gecko Media Plugin to handle H.264 files

This Cisco OpenH264 plugin is automatically installed in Firefox 33, so no need to worry.

  • bug 1009909 - Firefox desktop: Integrate the openh264 media plugin in the add-ons manager

Cisco OpenH264: http://www.openh264.org/

Modified by cor-el

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I hope someone can positively Identify these folders as clean and not malware, Thanks

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Chosen Solution

They are part of the current Firefox setup as you can read in the blog post.

You can disable the OpenH264 plugin in "Firefox/Tools > Add-ons > Plugins" if you like.

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To return to the "chronic popups", what do those look like -- is it the Firefox notification bar that the current page wants to use the plugin? If you don't want notification, you can switch the permission on the plugin:

  • "Always Activate" - pages can use this plugin without permission (but you can block them using the Lego-block-like icon in the address bar)
  • "Never Activate" - completely hides the plugin from pages

If it's a different kind of popup, could you describe it in more detail?

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about:config and search on gmp-gmpopenh264 it shows attached to a media type driver? I have asked the same question because Win7 showed an event error and crash report, but Norton said it was safe? This all happened when I updated to Firefox 33 a few minutes 10/16/14 CT 2 pm.

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Hi hpmini2009, I found a newer article with more information about this new plugin:

http://andreasgal.com/2014/10/14/openh264-now-in-firefox/

Now... what crashed?

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Hi jscher2000: No crash seen in Firefox 33. Open new tab about:config search on gmpopenh264. A driver file and an info file. Deactivate dll as per another blog on mozilla support site. Thanks again. Norton claims driver is OK. It would be great if these threads were numbered like other blogger sites, ie. crackberry, cnet....