hello, could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this might give us a clue what is going on...

Do those pages have flash on them? Have you had trouble with flash?

This is not a cure, but should let the web page load without crashing.

Flash block {web link} Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on it

Some of your crash reports weren’t sent to the Mozilla Servers.

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers/letters, click it and select Submit.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

{

 "application": {
   "name": "Firefox",
   "version": "42.0",
   "buildID": "20151029151421",
   "userAgent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0",
   "safeMode": false,
   "updateChannel": "release",
   "supportURL": "https://support.mozilla.org/1/firefox/42.0/WINNT/en-US/",
   "numTotalWindows": 1,
   "numRemoteWindows": 0,
   "remoteAutoStart": false
 },
 "modifiedPreferences": {
   "browser.cache.disk.smart_size.first_run": false,
   "browser.cache.disk.smart_size.use_old_max": false,
   "browser.cache.disk.capacity": 358400,
   "browser.cache.disk.filesystem_reported": 1,
   "browser.cache.frecency_experiment": 2,
   "browser.download.importedFromSqlite": true,
   "browser.places.smartBookmarksVersion": 7,
   "browser.sessionstore.upgradeBackup.latestBuildID": "20151029151421",
   "browser.startup.homepage_override.mstone": "42.0",
   "browser.startup.homepage": "https://www.google.com/?gws_rd=ssl",
   "browser.startup.homepage_override.buildID": "20151029151421",
   "dom.apps.reset-permissions": true,
   "dom.mozApps.used": true,
   "extensions.lastAppVersion": "42.0",
   "gfx.driver-init.feature-d3d11": true,
   "gfx.driver-init.deviceID": "0x13c2",
   "gfx.driver-init.driverVersion": "10.18.13.5891",
   "gfx.driver-init.status": 2,
   "gfx.direct3d.last_used_feature_level_idx": 0,
   "gfx.driver-init.appVersion": "42.0",
   "gfx.driver-init.feature-d2d": true,
   "media.gmp-eme-adobe.lastUpdate": 1448351379,
   "media.gmp-manager.buildID": "20151029151421",
   "media.gmp-gmpopenh264.lastUpdate": 1448351379,
   "media.gmp-gmpopenh264.version": "1.5.1",
   "media.gmp-eme-adobe.abi": "x86-msvc",
   "media.hardware-video-decoding.failed": false,
   "media.gmp-eme-adobe.version": "15",
   "media.gmp-gmpopenh264.abi": "x86-msvc",
   "media.gmp-gmpopenh264.enabled": true,
   "media.gmp-manager.lastCheck": 1448351376,
   "network.cookie.prefsMigrated": true,
   "network.predictor.cleaned-up": true,
   "places.history.expiration.transient_current_max_pages": 104858,
   "plugin.state.npadobeaamdetect": 2,
   "plugin.importedState": true,
   "plugin.state.npctrl": 2,
   "plugin.state.nppdf": 2,
   "plugin.disable_full_page_plugin_for_types": "application/pdf",
   "plugin.state.npgoogleupdate": 2,
   "privacy.sanitize.migrateFx3Prefs": true
 },
 "lockedPreferences": {},
 "graphics": {
   "numTotalWindows": 1,
   "numAcceleratedWindows": 1,
   "windowLayerManagerType": "Direct3D 11",
   "windowLayerManagerRemote": true,
   "supportsHardwareH264": true,
   "adapterDescription": "NVIDIA GeForce GTX 970",
   "adapterVendorID": "0x10de",
   "adapterDeviceID": "0x13c2",
   "adapterSubsysID": "367b1458",
   "adapterRAM": "4095",
   "adapterDrivers": "nvd3dumx,nvwgf2umx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um,nvwgf2um",
   "driverVersion": "10.18.13.5891",
   "driverDate": "11-5-2015",
   "adapterDescription2": "",
   "adapterVendorID2": "",
   "adapterDeviceID2": "",
   "adapterSubsysID2": "",
   "adapterRAM2": "",
   "adapterDrivers2": "",
   "driverVersion2": "",
   "driverDate2": "",
   "isGPU2Active": false,
   "direct2DEnabled": true,
   "directWriteEnabled": true,
   "directWriteVersion": "10.0.10240.16430",
   "webglRenderer": "Google Inc. -- ANGLE (NVIDIA GeForce GTX 970 Direct3D11 vs_5_0 ps_5_0)",
   "info": {
     "AzureCanvasBackend": "direct2d 1.1",
     "AzureSkiaAccelerated": 0,
     "AzureFallbackCanvasBackend": "cairo",
     "AzureContentBackend": "direct2d 1.1"
   }
 },
 "javaScript": {
   "incrementalGCEnabled": true
 },
 "accessibility": {
   "isActive": false,
   "forceDisabled": 0
 },
 "libraryVersions": {
   "NSPR": {
     "minVersion": "4.10.10",
     "version": "4.10.10"
   },
   "NSS": {
     "minVersion": "3.19.4 Basic ECC",
     "version": "3.19.4 Basic ECC"
   },
   "NSSUTIL": {
     "minVersion": "3.19.4",
     "version": "3.19.4"
   },
   "NSSSSL": {
     "minVersion": "3.19.4 Basic ECC",
     "version": "3.19.4 Basic ECC"
   },
   "NSSSMIME": {
     "minVersion": "3.19.4 Basic ECC",
     "version": "3.19.4 Basic ECC"
   }
 },
 "userJS": {
   "exists": false
 },
 "crashes": {
   "submitted": [
     {
       "id": "bp-6fc6767c-7731-4df7-bfdd-7e0362151124",
       "date": 1448393283918,
       "pending": false
     },
     {
       "id": "bp-b8087d7d-b7e7-42aa-871d-ed1b92151124",
       "date": 1448392981581,
       "pending": false
     },
     {
       "id": "bp-e01ec623-b97f-40fa-ac0b-81fd02151124",
       "date": 1448354265323,
       "pending": false
     },
     {
       "id": "bp-78bf1a82-24e0-4b99-a515-62c9e2151124",
       "date": 1448353130482,
       "pending": false
     },
     {
       "id": "bp-9ac97b23-6cdb-4729-b49e-df8952151124",
       "date": 1448353076324,
       "pending": false
     },
     {
       "id": "bp-1ffa322b-be4e-411c-8840-207022151124",
       "date": 1448352515259,
       "pending": false
     },
     {
       "id": "bp-602e563d-b9a6-4c86-a123-d49622151124",
       "date": 1448352452372,
       "pending": false
     },
     {
       "id": "bp-92ffcaaa-b7dd-4e83-80d3-237712151124",
       "date": 1448352419686,
       "pending": false
     },
     {
       "id": "bp-27cb0ec1-2a94-44a3-8851-58a272151124",
       "date": 1448352257461,
       "pending": false
     },
     {
       "id": "bp-0cb4554d-a646-49ca-bc3c-aec842151124",
       "date": 1448351462227,
       "pending": false
     }
   ],
   "pending": 4
 },
 "extensions": [
   {
     "name": "Adblock Plus",
     "version": "2.6.11",
     "isActive": true,
     "id": "{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}"
   },
   {
     "name": "Classic Theme Restorer",
     "version": "1.4.3",
     "isActive": true,
     "id": "ClassicThemeRestorer@ArisT2Noia4dev"
   },
   {
     "name": "Ghostery",
     "version": "5.4.9",
     "isActive": true,
     "id": "firefox@ghostery.com"
   },
   {
     "name": "Adobe Acrobat DC - Create PDF",
     "version": "15",
     "isActive": false,
     "id": "web2pdfextension@web2pdf.adobedotcom"
   },
   {
     "name": "Norton Identity Safe",
     "version": "2015.5.6.76",
     "isActive": false,
     "id": "{C1A2A613-35F1-4FCF-B27F-2840527B6556}"
   }
 ],
 "experiments": []

}

thank you. so as this looks like an issue with hardware acceleration, but you're already using an up-to-date graphics driver, the only thing that i can recommend here is to disable hardware acceleration in the firefox menu ≡ > options > advanced > general (that setting will take a restart of the browser to take effect).

philipp said

thank you. so as this looks like an issue with hardware acceleration, but you're already using an up-to-date graphics driver, the only thing that i can recommend here is to disable hardware acceleration in the firefox menu ≡ > options > advanced > general (that setting will take a restart of the browser to take effect).

Thanks, that worked! What does hardware acceleration do exactly? Would I even notice any difference in browsing?

if it worked correctly, hardware acceleration would use the computational power of your graphics card instead of your cpu to render certain elements of a page, which can speed up things...