Hey,

can you please give us a copy of your Troubleshooting Information:

Go to Help > Troubleshooting Information and copy & paste it here.

--Tobbi

Sorry Tobbi...I had listed the Firefox version and OS, but it didn't post. Anyhow, here's the whole shebang. -- Wendy Lea

 Application Basics

       Name:  Firefox

       Version:  11.0

       User Agent
       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20100101 Firefox/11.0

       Profile Directory
         Open Containing Folder
       Enabled Plugins
         about:plugins
       Build Configuration
         about:buildconfig
       Crash Reports
         about:crashes
       Memory Use
         about:memory
 Extensions
       Name
       Version
       Enabled
       ID
       Browse For Change   0.2      true
       browseforchange@browseforchange.com

       FireFTP    2.0.1   true
       {a7c6cf7f-112c-4500-a7ea-39801a327e5f}

       PDF Converter 7.0    1.0       true
       nuance@pdf7

       Zoom Downloader     1.0      true
       downloadmanager@zoomdownloader.com

       Adobe Acrobat - Create PDF      1.0      false
       web2pdfextension@web2pdf.adobedotcom

       Adobe DLM (powered by getPlus(R))   1,6,2,36     false
       {E2883E8F-472F-4fb0-9522-AC9BF37916A7}

       AVG Safe Search     12.0.0.1912      false
       {1E73965B-8B48-48be-9C8D-68B920ABC1C4}

       Copy To Wordperfect Lightning     1.0     false
       copytolightning@corel.com

       TVU Web Player     2,5,3,1      false
       firefox@tvunetworks.com

 Modified Preferences
     Name
     Value
       accessibility.typeaheadfind.flashBar        0
       browser.history_expire_days.mirror        120
       browser.history_expire_days_min        180
       browser.places.importBookmarksHTML        false
       browser.places.importDefaults        false
       browser.places.leftPaneFolderId        -1
       browser.places.migratePostDataAnnotations        false
       browser.places.smartBookmarksVersion        2
       browser.places.updateRecentTagsUri        false
       browser.startup.homepage        http://www.emekshalom.org/
       browser.startup.homepage_override.buildID        20120312181643
       browser.startup.homepage_override.mstone        rv:11.0
       browser.tabs.warnOnClose        false
       dom.ipc.plugins.enabled.npmywebs.dll        false
       extensions.lastAppVersion        11.0
       gfx.blacklist.layers.opengl        5
       gfx.blacklist.webgl.opengl        5
       network.cookie.prefsMigrated        true
       places.database.lastMaintenance        1333480058
       places.history.expiration.transient_current_max_pages        104858
       places.last_vacuum        1332267191
       plugin.disable_full_page_plugin_for_types        image/jp2,image/jpeg2000,image/jpeg2000-image,image/x-jpeg2000-image,audio/x-gsm,image/x-sgi,application/x-shockwave-fla…

              privacy.sanitize.migrateFx3Prefs        true
       security.warn_viewing_mixed        false

 Graphics
       Adapter Description        Intel(R) G41 Express Chipset
       Vendor ID        8086
       Device ID        2e32
       Adapter RAM        Unknown
       Adapter Drivers
              igdumd64 igd10umd64 igdumdx32 igd10umd32
       Driver Version        8.15.10.2226
       Driver Date        10-15-2010
       Direct2D Enabled        true
       DirectWrite Enabled        true (6.1.7601.17776)
       ClearType Parameters
           Gamma: 2200 Pixel Structure: RGB ClearType Level: 50 Enhanced   
           Contrast: 300
       WebGL Renderer
       Google Inc. -- ANGLE (Intel(R) G41 Express Chipset) -- OpenGL ES 2.0   
               (ANGLE 1.0.0.930)
       GPU Accelerated Windows        1/1 Direct3D 10
       AzureBackend        direct2d

Hey,

to me it looks like plugin.disable_full_page_plugin_for_types is what's causing the issues.

1. Enter about:config in Firefox and press Enter, confirm the security exception.

2. Now, search for the above preference name.

3. Right-click on it and select Reset.

--Tobbi

Fast reply, Tobbi! Unfortunately, I followed your suggestion(s), opened and closed Firefox, and no change. Any other suggestions? By the way, I tried to UNINSTALL and then reinstall Firefox (WITHOUT deleting my personal information). Doing all that produced nothing as well. I'm ready to pull my hair out. (By the way, I've been a computer consultant for several decades, but my experience is not helping!) -- Wendy Lea

Does How to start Firefox in Safe Mode help anything?

--Tobbi

AHA! Yes...safe mode worked! So...what does that now tell me how to correct the issue? -- Wendy Lea

Hey,

now, this means that one of your add-ons is causing the problem. Try to disable one add-on at a time to see which one it is.

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.

--Tobbi

You are a GEM, Tobbi. I disabled ALL of them (as I can always add them back in). I can now open all types of files again. THANK YOU!!!!! --Wendy Lea