"application": {
   "name": "Firefox",
   "version": "23.0",
   "userAgent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0",
   "supportURL": "http://support.mozilla.org/1/firefox/23.0/WINNT/en-US/"
 },
 "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": 4,
   "browser.startup.homepage_override.mstone": "23.0",
   "browser.startup.homepage_override.buildID": "20130730113002",
   "browser.tabs.warnOnClose": false,
   "extensions.lastAppVersion": "23.0",
   "gfx.direct2d.disabled": true,
   "gfx.direct3d.last_used_feature_level_idx": 0,
   "layers.acceleration.disabled": true,
   "network.cookie.prefsMigrated": true,
   "places.history.expiration.transient_current_max_pages": 104858,
   "places.database.lastMaintenance": 1376171668,
   "plugin.state.npctrl": 0,
   "plugin.importedState": true,
   "plugin.state.npitunes": 0,
   "plugin.disable_full_page_plugin_for_types": "application/pdf",
   "plugin.state.nppdf": 0,
   "plugin.state.java": 0,
   "plugin.state.npwlpg": 0,
   "plugin.state.npdeployjava": 0,
   "plugin.state.npgoogleupdate": 0,
   "plugin.state.npystate": 0,
   "plugin.state.flash": 0,
   "privacy.sanitize.migrateFx3Prefs": true,
   "storage.vacuum.last.places.sqlite": 1376171668,
   "storage.vacuum.last.index": 0
 },
 "graphics": {
   "numTotalWindows": 1,
   "numAcceleratedWindows": 0,
   "windowLayerManagerType": "Basic",
   "numAcceleratedWindowsMessage": [
     ""
   ],
   "adapterDescription": "AMD Radeon HD 6700 Series",
   "adapterVendorID": "0x1002",
   "adapterDeviceID": "0x68b8",
   "adapterRAM": "1024",
   "adapterDrivers": "aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64",
   "driverVersion": "12.104.0.0",
   "driverDate": "3-28-2013",
   "adapterDescription2": "",
   "adapterVendorID2": "",
   "adapterDeviceID2": "",
   "adapterRAM2": "",
   "adapterDrivers2": "",
   "driverVersion2": "",
   "driverDate2": "",
   "isGPU2Active": false,
   "direct2DEnabled": false,
   "directWriteEnabled": false,
   "directWriteVersion": "6.2.9200.16571",
   "clearTypeParameters": "DISPLAY1 [ Gamma: 2200 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 50 ] DISPLAY2 [ Gamma: 1800 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 100 ] ",
   "direct2DEnabledMessage": [
     ""
   ],
   "webglRenderer": "Google Inc. -- ANGLE (AMD Radeon HD 6700 Series)",
   "info": {
     "AzureCanvasBackend": "skia",
     "AzureFallbackCanvasBackend": "cairo",
     "AzureContentBackend": "none"
   }
 },
 "javaScript": {
   "incrementalGCEnabled": true
 },
 "accessibility": {
   "isActive": false,
   "forceDisabled": 0
 },
 "libraryVersions": {
   "NSPR": {
     "minVersion": "4.10",
     "version": "4.10"
   },
   "NSS": {
     "minVersion": "3.15 Basic ECC",
     "version": "3.15 Basic ECC"
   },
   "NSSUTIL": {
     "minVersion": "3.15",
     "version": "3.15"
   },
   "NSSSSL": {
     "minVersion": "3.15 Basic ECC",
     "version": "3.15 Basic ECC"
   },
   "NSSSMIME": {
     "minVersion": "3.15 Basic ECC",
     "version": "3.15 Basic ECC"
   }
 },
 "userJS": {
   "exists": false
 },
 "extensions": []

I tried to reinstall, clear cache, extension, plug ins. But nothing works. Here's what I got { "application": { "name": "Firefox", "version": "23.0", "userAgent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0", "supportURL": "http://support.mozilla.org/1/firefox/23.0/WINNT/en-US/" }, "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": 4, "browser.startup.homepage_override.mstone": "23.0", "browser.startup.homepage_override.buildID": "20130730113002", "browser.tabs.warnOnClose": false, "extensions.lastAppVersion": "23.0", "gfx.direct2d.disabled": true, "gfx.direct3d.last_used_feature_level_idx": 0, "layers.acceleration.disabled": true, "network.cookie.prefsMigrated": true, "places.history.expiration.transient_current_max_pages": 104858, "places.database.lastMaintenance": 1376171668, "plugin.state.npctrl": 0, "plugin.importedState": true, "plugin.state.npitunes": 0, "plugin.disable_full_page_plugin_for_types": "application/pdf", "plugin.state.nppdf": 0, "plugin.state.java": 0, "plugin.state.npwlpg": 0, "plugin.state.npdeployjava": 0, "plugin.state.npgoogleupdate": 0, "plugin.state.npystate": 0, "plugin.state.flash": 0, "privacy.sanitize.migrateFx3Prefs": true, "storage.vacuum.last.places.sqlite": 1376171668, "storage.vacuum.last.index": 0 }, "graphics": { "numTotalWindows": 1, "numAcceleratedWindows": 0, "windowLayerManagerType": "Basic", "numAcceleratedWindowsMessage": [ "" ], "adapterDescription": "AMD Radeon HD 6700 Series", "adapterVendorID": "0x1002", "adapterDeviceID": "0x68b8", "adapterRAM": "1024", "adapterDrivers": "aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64", "driverVersion": "12.104.0.0", "driverDate": "3-28-2013", "adapterDescription2": "", "adapterVendorID2": "", "adapterDeviceID2": "", "adapterRAM2": "", "adapterDrivers2": "", "driverVersion2": "", "driverDate2": "", "isGPU2Active": false, "direct2DEnabled": false, "directWriteEnabled": false, "directWriteVersion": "6.2.9200.16571", "clearTypeParameters": "DISPLAY1 [ Gamma: 2200 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 50 ] DISPLAY2 [ Gamma: 1800 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 100 ] ", "direct2DEnabledMessage": [ "" ], "webglRenderer": "Google Inc. -- ANGLE (AMD Radeon HD 6700 Series)", "info": { "AzureCanvasBackend": "skia", "AzureFallbackCanvasBackend": "cairo", "AzureContentBackend": "none" } }, "javaScript": { "incrementalGCEnabled": true }, "accessibility": { "isActive": false, "forceDisabled": 0 }, "libraryVersions": { "NSPR": { "minVersion": "4.10", "version": "4.10" }, "NSS": { "minVersion": "3.15 Basic ECC", "version": "3.15 Basic ECC" }, "NSSUTIL": { "minVersion": "3.15", "version": "3.15" }, "NSSSSL": { "minVersion": "3.15 Basic ECC", "version": "3.15 Basic ECC" }, "NSSSMIME": { "minVersion": "3.15 Basic ECC", "version": "3.15 Basic ECC" } }, "userJS": { "exists": false }, "extensions": [] } This doesn't make sense to me and I really wish it'll work again.