Hey Guys, Firefox was running smoothly till installing the Windows MediaFeaturePack x64 1809Oct (needed for some other programs). Now the tabs keep crashing when hitting certain sites. I can open Youtube's main page, but no site with an actual video on it. Can't open any site from the support.mozilla domain, etc I tried: - start FF in safe mode - cleaning and reinstalling FF Win 10 Pro N 64 17763.316 Any clues on what might help? Thx! Here is a crash report. AdapterDeviceID=0x1b81 AdapterDriverVersion=25.21.14.1917 AdapterSubsysID=1b8110de AdapterVendorID=0x10de Add-ons=formautofill%40mozilla.org:1.0,screenshots%40mozilla.org:35.0.0,webcompat%40mozilla.org:3.0.0 BIOS_Manufacturer=American Megatrends Inc. BuildID=20190211233335 ContentSandboxCapable=1 ContentSandboxLevel=5 DOMIPCEnabled=1 EMCheckCompatibility=true GPUProcessLaunchCount=1 GPUProcessStatus=Running InstallTime=1550422410 MemoryErrorCorrection=None Notes=FP(D00-L1000-W00001000-T000) \nDWrite? DWrite+ WR? WR- OMTP? OMTP+4 ProductID={ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName=Firefox ReleaseChannel=release SafeMode=0 ServerURL=https://crash-reports.mozilla.com/submit?id={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&version=65.0.1&buildid=20190211233335 TelemetryEnvironment={"build":{"applicationId":"{ec8030f7-c20a-464f-9b0e-13a3a9e97384}","applicationName":"Firefox","architecture":"x86-64","buildId":"20190211233335","version":"65.0.1","vendor":"Mozilla","displayVersion":"65.0.1","platformVersion":"65.0.1","xpcomAbi":"x86_64-msvc","updaterAvailable":true},"partner":{"distributionId":null,"distributionVersion":null,"partnerId":null,"distributor":null,"distributorChannel":null,"partnerNames":[]},"system":{"memoryMB":16317,"virtualMaxMB":134217728,"cpu":{"count":12,"cores":6,"vendor":"AuthenticAMD","family":23,"model":8,"stepping":2,"l2cacheKB":512,"l3cacheKB":8192,"speedMHz":3394,"extensions":["hasMMX","hasSSE","hasSSE2","hasSSE3","hasSSSE3","hasSSE4_1","hasSSE4_2","hasAVX","hasAVX2","hasAES"]},"os":{"name":"Windows_NT","version":"10.0","locale":"de-DE","servicePackMajor":0,"servicePackMinor":0,"windowsBuildNumber":17763,"windowsUBR":316,"installYear":2019},"hdd":{"profile":{"model":"","revision":""},"binary":{"model":"CT500MX500SSD1","revision":"M3CR023"},"system":{"model":"","revision":""}},"gfx":{"D2DEnabled":true,"DWriteEnabled":true,"ContentBackend":"Skia","adapters":[{"description":"NVIDIA GeForce GTX ","vendorID":"0x10de","deviceID":"0x1b81","subsysID":"1b8110de","RAM":8192,"driver":"C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumdx.dll,C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumdx.dll,C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumdx.dll,C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumdx.dll C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumd.dll,C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumd.dll,C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumd.dll,C:\\\\WINDOWS\\\\System32\\\\DriverStore\\\\FileRepository\\\\nv_dispi.inf_amd64_edcffbdd101bbe5b\\\\nvldumd.dll","driverVersion":"25.21.14.1917","driverDate":"2-20-2019","GPUActive":true}],"monitors":[{"screenWidth":1920,"screenHeight":1200,"refreshRate":59,"pseudoDisplay":false}],"features":{"compositor":"d3d11","gpuProcess":{"status":"available"},"wrQualified":{"status":"available"},"webrender":{"status":"opt-in"},"advancedLayers":{"status":"available"},"d3d11":{"status":"available","version":45312,"warp":false,"textureSharing":true,"blacklisted":false},"d2d":{"status":"available","version":"1.1"}}},"appleModelId":null,"isWow64":false,"sec":{"userPrefs":{"browser.search.widget.inNavBar":false,"browser.cache.disk.capacity":1048576,"browser.search.region":"DE"},"sandbox":{"effectiveContentProcessLevel":5},"addonCompatibilityCheckEnabled":true,"isDefaultBrowser":true,"defaultSearchEngine":"google-b-d","defaultSearchEngineData":{"name":"Google","loadPath":"jar:[app]/omni.ja!/google-b-d.xml","origin":"default","submissionURL":"https://www.google.com/search?client=firefox-b-d&q="}},"profile":{"creationDate":17107,"resetDate":17951},"addons":{"activeAddons":{"formautofill@mozilla.org":{"version":"1.0","scope":1,"type":"extension","updateDay":17939,"isSystem":true,"isWebExtension":true,"multiprocessCompatible":true,"blocklisted":false,"description":null,"name":"Form 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9fc48064-7298-43e4-b7bd-181f2089792a useragent_locale=de TelemetrySessionId=9563ef18-9c4d-4640-9b38-1c0854f62867 CrashTime=1551005135 UptimeTS=478.6 AvailablePageFile=15464292352 AvailablePhysicalMemory=13928013824 AvailableVirtualMemory=140731214319616 SystemMemoryUsePercentage=18 ThreadIdNameMapping=12004:"Chrome_ChildThread",10812:"JS Watchdog",6324:"JS Helper",1216:"JS Helper",10280:"JS Helper",9840:"JS Helper",9848:"JS Helper",5580:"JS Helper",2700:"JS Helper",888:"JS Helper",8308:"Socket Thread",3860:"Timer",12256:"Worker Launcher",2000:"PaintThread",8828:"ImgDecoder #1",9784:"ImageIO",2880:"ImageBridgeChild",4496:"VideoChild",11744:"DOM File",11696:"ProcessHangMon",4284:"ProfilerChild",11976:"HTML5 Parser",10408:"StyleThread#3",3868:"StyleThread#0",620:"StyleThread#1",8452:"StyleThread#2",5512:"StyleThread#4",9908:"StyleThread#5",10160:"StreamTrans #2",7500:"ImgDecoder #2",528:"ImgDecoder #3",10700:"ImgDecoder #4",8032:"ImgDecoder #5",9776:"ImgDecoder #6",7740:"ImgDecoder #7",7456:"DOM Worker",1496:"COM MTA", TotalPageFile=20867473408 TotalPhysicalMemory=17109377024 TotalVirtualMemory=140737488224256 AdapterDeviceID=0x1b81 AdapterDriverVersion=25.21.14.1917 AdapterSubsysID=1b8110de AdapterVendorID=0x10de ContentSandboxEnabled=1 ContentSandb