Davon brauchst eigentlich nix löschen. Mach bitte mal die Registry Suche mit FRST.

Okay, danke.

Hier das Ergebnis der Registry Suche.

Farbar Recovery Scan Tool (x64) Version:13-08-2015
durchgeführt von Andrea (2015-08-20 17:17:19)
Gestartet von C:\Users\Andrea\Desktop
Start-Modus: Normal

================== Registry-Suche: "Firefox" ===========

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Features\44870A0846AC4ED4BA163DD7BD8E70F4]
"IntegrFirefox"="Complete"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon\FirefoxHTML]
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon\FirefoxHTML\DefaultIcon]
""="C:\Program Files (x86)\Mozilla Firefox\firefox.exe,1"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RADAR\HeapLeakDetection\DiagnosedApplications\firefox.exe]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\44870A0846AC4ED4BA163DD7BD8E70F4\Features]
"IntegrFirefox"="6RC{0f8Vr95b!RnHQ-$DKC96Z6`es?J2c$]h'zBv=thhN})nA9P[kY3`tW18Y9qh6*(Z4=%u}+(_5FHVComplete"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers]
"SIGN.IE=07D3DD0 Firefox%20Setup%203.6.2.exe"="VISTARTM"
[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Firefox]
[HKEY_LOCAL_MACHINE\SOFTWARE\Synaptics\SynTP\Defaults\AppProfiles\Mozilla Firefox]
[HKEY_LOCAL_MACHINE\SOFTWARE\Synaptics\SynTPEnh\OSD\TouchPad\AppProfiles\Mozilla Firefox]
[HKEY_LOCAL_MACHINE\SOFTWARE\Synaptics\SynTPEnh\OSD\TouchPad\AppProfiles\Mozilla Firefox]
"AppExe"="firefox.exe"
[HKEY_LOCAL_MACHINE\SOFTWARE\Synaptics\SynTPEnh\OSD\TouchPad\AppProfiles\Mozilla Firefox]
"AppFriendlyName"="Mozilla Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Synaptics\SynTPEnh\PlugInConfig\TouchPad\AppProfiles\Mozilla Firefox]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Shared\HTML]
"KnownIDs"="htmlfile;FirefoxHTML"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\firefox_RASAPI32]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Tracing\firefox_RASMANCS]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Mozilla\Firefox]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@microsoft.com/OfficeLive,version=1.3]
"ProductName"="Microsoft Office Live Plug-in for Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@microsoft.com/OfficeLive,version=1.5]
"ProductName"="Microsoft Office Live Plug-in for Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@microsoft.com/SharePoint,version=14.0]
"Description"="Microsoft SharePoint Plug-in for Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@microsoft.com/SharePoint,version=14.0]
"ProductName"="Microsoft SharePoint Plug-in for Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@microsoft.com/SharePoint,version=14.0\MimeTypes\application/x-sharepoint]
"Description"="Microsoft SharePoint Plug-in for Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@perfectworld.com/npArcPlayNowPlugin\MimeTypes\application/firefox-interactwithclient-plugin]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\Adobe Reader]
"Description"="Handles PDFs in-place in Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\Adobe Reader]
"ProductName"="Adobe Reader Plugin for Firefox"
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Safer Networking Limited\PortableSupport]
"Firefox"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon\FirefoxHTML]
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon\FirefoxHTML\DefaultIcon]
""="C:\Program Files (x86)\Mozilla Firefox\firefox.exe,1"
[HKEY_USERS\.DEFAULT\Software\Safer Networking Limited\Localization]
"C:\Program Files (x86)\Mozilla Firefox\"=""
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\AVAST Software\Avast Browser Cleanup]
"firefox_SP"="8D26A3F9454C05783CD0BC4FE15F13A616ED9877DC910BC9968F0869AB297C86"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Clients\StartMenuInternet]
""="FIREFOX.EXE"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Google\Update\proxy]
"source"="Firefox"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Mail.Ru\Guard]
"firefox.exe"="0"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Mail.Ru\Guard]
"firefox.exe.delay"="3"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Internet Explorer\LowRegistry\Audio\PolicyConfig\PropertyStore\15ab5e1_0]
""="{0.0.0.00000000}.{961b0bb0-66b2-4c6a-aee2-fa3f89441c16}|\Device\HarddiskVolume3\Program Files (x86)\Mozilla Firefox\firefox.exe%b{00000000-0000-0000-0000-000000000000}"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Internet Explorer\LowRegistry\Audio\PolicyConfig\PropertyStore\a284f2ad_0]
""="{0.0.0.00000000}.{961b0bb0-66b2-4c6a-aee2-fa3f89441c16}|\Device\HarddiskVolume3\Program Files (x86)\Mozilla Firefox\plugin-container.exe%b{00000000-0000-0000-0000-000000000000}"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Internet Explorer\LowRegistry\Audio\PolicyConfig\PropertyStore\b40c19e4_0]
""="{0.0.0.00000000}.{961b0bb0-66b2-4c6a-aee2-fa3f89441c16}|\Device\HarddiskVolume3\Program Files (x86)\Mozilla Firefox\updated\firefox.exe%b{00000000-0000-0000-0000-000000000000}"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.7z\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.aup\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.CATDrawing\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.doc\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.docx\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.emf\OpenWithList]
"c"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.eml\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.gif\OpenWithList]
"e"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\OpenWithProgids]
"FirefoxHTML"=""
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice]
"Progid"="FirefoxHTML"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\OpenWithProgids]
"FirefoxHTML"=""
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice]
"Progid"="FirefoxHTML"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ica\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ics\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jar\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jnlp\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jpeg\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jpg\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mp3\OpenWithList]
"c"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.msi\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.odp\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ods\OpenWithList]
"c"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.odt\OpenWithList]
"c"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.part\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pcf\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.png\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ppt\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pptx\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rar\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.shtml\OpenWithProgids]
"FirefoxHTML"=""
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.shtml\UserChoice]
"Progid"="FirefoxHTML"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.tar\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.txt\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.vcf\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice]
"Progid"="FirefoxHTML"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice]
"Progid"="FirefoxHTML"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xls\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xlsx\OpenWithList]
"b"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.zip\OpenWithList]
"a"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\DDECache\Firefox]
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\DDECache\Firefox\WWW_OpenURL]
"ProcessName"="firefox.exe"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\ftp\UserChoice]
"Progid"="FirefoxURL"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice]
"Progid"="FirefoxURL"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\https\UserChoice]
"Progid"="FirefoxURL"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Persisted]
"C:\Users\Andrea\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\N2HMOI6X\Firefox_Setup_3.6.2[1].exe"="1"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Persisted]
"SIGN.IE=07D3DD0 Firefox%20Setup%203.6.2.exe"="1"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Persisted]
"C:\Users\Andrea\Downloads\Firefox Setup 4.0.1.exe"="1"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Persisted]
"C:\Users\Andrea\Downloads\Firefox Setup Stub 39.0.exe"="1"
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Safer Networking Limited\Localization]
"C:\Program Files (x86)\Mozilla Firefox\"=""
[HKEY_USERS\S-1-5-21-864334625-1213360965-2481295583-1001\Software\Safer Networking Limited\PortableSupport]
"Firefox"=""
[HKEY_USERS\S-1-5-18\Software\Safer Networking Limited\Localization]
"C:\Program Files (x86)\Mozilla Firefox\"=""

====== Ende von Suche ======
         

Versuch es mal so:
https://support.mozilla.org/de/kb/Ad...alliert-werden

Also soll ich Firefox jetzt erst mal wieder installieren, um es dann wieder zu deinstallieren?
Versteh ich das richtig?
Weil im Moment ist Firefox nicht installiert.

Installieren, dann den Profile Ordner bearbeiten bzw im FF Safe Mode das Addon löschen.

Moin schrauber,

starten im abgesicherten Modus ergibt keine Veränderung. Ich kann die Plugins immer noch nicht löschen.

Manuekk geht auch nicht, da der Ordner extensions nicht existiert, obwohl die Plugins ja da sind.


Ich würde es an dieser Stelle aufgeben, da ich meinen Laptop diese Woche zwingend mit funktionierendem Internet brauchte. Bzw. nicht auf einen anderen ausweichen kann.
Vielen Dank für die Hilfe soweit.

Es ist schon extrem merkwürdig das Ganze...