Can you give me your troubleshooting information?

• about:support | click copy raw data into clipboard then paste here.

Have you tried using Reddit in Safe Mode?

• Hold the SHIFT key while double clicking the Firefox desktop shortcut (be sure Firefox is closed first)

Here's the raw data copied from the troubleshooting page:

{

 "application": {
   "name": "Firefox",
   "version": "28.0",
   "userAgent": "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0",
   "supportURL": "https://support.mozilla.org/1/firefox/28.0/WINNT/en-US/"
 },
 "crashes": {
   "submitted": [],
   "pending": 0
 },
 "modifiedPreferences": {
   "browser.cache.disk.capacity": 358400,
   "browser.cache.disk.smart_size.first_run": false,
   "browser.cache.disk.smart_size.use_old_max": false,
   "browser.cache.disk.smart_size_cached_value": 358400,
   "browser.places.smartBookmarksVersion": 6,
   "browser.sessionstore.upgradeBackup.latestBuildID": "20140314220517",
   "browser.startup.homepage_override.mstone": "28.0",
   "browser.startup.homepage_override.buildID": "20140314220517",
   "dom.mozApps.used": true,
   "extensions.lastAppVersion": "28.0",
   "gfx.direct3d.last_used_feature_level_idx": 0,
   "network.cookie.prefsMigrated": true,
   "places.history.expiration.transient_current_max_pages": 104858,
   "plugin.importedState": true,
   "plugin.disable_full_page_plugin_for_types": "application/pdf",
   "privacy.sanitize.timeSpan": 0,
   "privacy.sanitize.migrateFx3Prefs": true,
   "security.disable_button.openCertManager": false
 },
 "graphics": {
   "numTotalWindows": 1,
   "numAcceleratedWindows": 1,
   "windowLayerManagerType": "Direct3D 10",
   "windowLayerManagerRemote": false,
   "adapterDescription": "AMD Radeon R7 200 Series",
   "adapterVendorID": "0x1002",
   "adapterDeviceID": "0x6610",
   "adapterRAM": "2048",
   "adapterDrivers": "aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64",
   "driverVersion": "13.251.0.0",
   "driverDate": "12-6-2013",
   "adapterDescription2": "",
   "adapterVendorID2": "",
   "adapterDeviceID2": "",
   "adapterRAM2": "",
   "adapterDrivers2": "",
   "driverVersion2": "",
   "driverDate2": "",
   "isGPU2Active": false,
   "direct2DEnabled": true,
   "directWriteEnabled": true,
   "directWriteVersion": "6.3.9600.16384",
   "webglRenderer": "Google Inc. -- ANGLE (AMD Radeon R7 200 Series Direct3D9Ex vs_3_0 ps_3_0)",
   "info": {
     "AzureCanvasBackend": "direct2d",
     "AzureSkiaAccelerated": 0,
     "AzureFallbackCanvasBackend": "cairo",
     "AzureContentBackend": "direct2d"
   }
 },
 "javaScript": {
   "incrementalGCEnabled": true
 },
 "accessibility": {
   "isActive": false,
   "forceDisabled": 0
 },
 "libraryVersions": {
   "NSPR": {
     "minVersion": "4.10.3",
     "version": "4.10.3"
   },
   "NSS": {
     "minVersion": "3.15.5 Basic ECC",
     "version": "3.15.5 Basic ECC"
   },
   "NSSUTIL": {
     "minVersion": "3.15.5",
     "version": "3.15.5"
   },
   "NSSSSL": {
     "minVersion": "3.15.5 Basic ECC",
     "version": "3.15.5 Basic ECC"
   },
   "NSSSMIME": {
     "minVersion": "3.15.5 Basic ECC",
     "version": "3.15.5 Basic ECC"
   }
 },
 "userJS": {
   "exists": false
 },
 "extensions": [
   {
     "name": "Adblock Plus",
     "version": "2.5.1",
     "isActive": true,
     "id": "{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}"
   },
   {
     "name": "Download videos and MP3s from YouTube",
     "version": "4.5.3.1206",
     "isActive": false,
     "id": "{B64D9B05-48E1-4CEB-BF58-E0643994E900}"
   },
   {
     "name": "V-bates",
     "version": "2.0.0.438",
     "isActive": false,
     "id": "{21EAF666-26B3-4a3c-ABD0-CA2F5A326744}"
   },
   {
     "name": "Video-Saver",
     "version": "1.157",
     "isActive": false,
     "id": "{a831944f-fdc3-4e66-aed3-9d5555ea9e85}"
   }
 ]

}

I haven't tried Safe Mode. How would I do that?

For what it's worth, this problem occurs in Chrome and IE as well, so any solutions that are specific to firefox may be missing the mark.

I noticed this while looking through my plugins, regarding Java. Since the message I keep seeing is about JavaScript, I'm wondering if this is relevant to the problem?

Java and Javascript are not the same thing

• JavaScript is an object-oriented scripting language that allows you to create dynamic HTML pages, allowing you to process input data and maintain data, usually within the browser.
• Java is a programming language, core set of libraries, and virtual machine platform that allows you to create compiled programs that run on nearly every platform, without distribution of source code in its raw form or recompilation.

You can enter Safe Mode by the following:

• Hold the SHIFT key while double clicking the Firefox desktop shortcut (Firefox must be closed)

Your extension "V-bates" looks really suspicious. You should disable that. It's most likely adware.

You can try these free programs to scan for malware, which work with your existing antivirus software:

• Microsoft Safety Scanner
• MalwareBytes' Anti-Malware
• TDSSKiller - AntiRootkit Utility
• Hitman Pro
• ESET Online Scanner

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

I don't know what V-Bates is, but it has been disabled. I can't uninstall it, however, at least not on the Firefox add-ons page.

I just started up in Safe Mode but the problem is persisting...

I will grab one of those programs and do some malware sweeps. I have the free version of AVG, would a full scan with that accomplish the same thing?

You might be able to uninstall it from the Control Panel.

You should use all of the programs listed above as they will detect different types of malware. AVG scans for certain things only and sometimes come up with false positives. I don't know how AVG is now as I'm on Linux. But to answer your question, to my knowledge, AVG doesn't do the job that the other programs do.

Okay. I'm running MalwareBytes Anti Malware now. I'll give them all a run.

Going to try to find V-bates in my programs list.

Fixed it, thank you! I just ran all the 5 of those programs and they removed a couple things. Whatever they removed was causing the problem because it's working fine again. I'm going to keep that list handy from now on.

No problem! Glad you got that solved! :)