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Letzte Aktualisierung 2. Okt. 2025

Erweiterung auf Firefox-Versionen älter als v128 oder v115 ESR

Laut einer Ankündigung von Mozilla zum Ablauf des Stammzertifikats von Firefox am 14. März 2025 können Erweiterungen in Firefox-Versionen, die älter als v128 oder v115.13 ESR sind, nicht installiert werden.
  • Wenn die Erweiterung bereits in Firefox installiert ist, funktioniert sie auch nach Ablauf des Stammzertifikats weiter.
  • Wird die Erweiterung nach Ablauf des Stammzertifikat installiert, wird diese deaktiviert und funktioniert nicht.
Sie können bestimmte Workarounds anwenden, aber dies hängt davon ab, wie alt Ihre Firefox-Version ist und ob es sich um eine ESR- (Extended Support Release) Version handelt oder nicht.

Lösung für Firefox ESR

  1. Wechseln Sie zu about:config .
  2. xpinstall.signatures.required Flagge auf false umschalten.
Sie sollte lieber diese Einstellung automatisch mithilfe einer der unten aufgeführten Methoden für alle Profile übernehmen.

Firefox v102.10 ESR oder neuer

Sie können Gruppenrichtlinien verwenden, um die Einstellung xpinstall.signatures.required für alle Benutzer und Profile automatisch zu ändern. Weitere Details finden Sie in den Richtlinienvorlagen für Firefox.

Firefox älter als v102.10 ESR

Bei älteren Versionen von Firefox wird xpinstall.signatures.required durch Gruppenrichtlinien nicht unterstützt.Als Alternative können Sie auch AutoConfig-Dateien verwenden:
  1. Speichern Sie Folgendes in einer Textdatei:
    // First line must be a comment.
    pref("xpinstall.signatures.required", false);// First line must be a comment.
    pref("xpinstall.signatures.required", false);
  2. Benennen Sie die Textdatei allow-unsigned-extensions.cfg.
  3. Speichern Sie Folgendes in einer Textdatei:
    // First line must be a comment. 
    pref("general.config.filename", "allow-unsigned-extensions.cfg");
    pref("general.config.obscure_value", 0);// First line must be a comment. 
    pref("general.config.filename", "allow-unsigned-extensions.cfg");
    pref("general.config.obscure_value", 0);
  4. Benennen Sie die Textdatei allow-unsigned-extensions.js.
  5. Suchen Sie das Firefox-Installationsverzeichnis, üblicherweise C:\Program Files\Mozilla Firefox.
  6. Kopieren Sie allow-unsigned-extensions.cfg zu C:\Program Files\Mozilla Firefox.
  7. Kopieren Sie allow-unsigned-extensions.js zu C:\Program Files\Mozilla Firefox\defaults\pref.

Firefox – normale Veröffentlichungen

Für andere als ESR-Veröffentlichungen von Firefox müssen Sie AutoConfig-Dateien verwenden.

  1. Speichern Sie Folgendes in einer Textdatei:
    // First line must be a comment.
    // In Firefox 55+, settings to configure add-on signing (and legacy add-ons) are stored in AddonSettings.jsm
    // The module exports an object with read-only properties, but that is not an issue since we can just replace
    // the exported object.
    // https://searchfox.org/mozilla-central/rev/2e08acdf8862e68b13166970e17809a3b5d6a555/toolkit/mozapps/extensions/internal/AddonSettings.jsm
    
    Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
    
    function patchAddonSettings(modulePath) {
        var Module = Components.utils.import(modulePath, {});
        // Note: we read the data from preferences instead of hard-coding a "true", so
        // that by default legacy add-ons are disabled. This enables the user to only
        // enable legacy add-ons for specific Firefox profiles when really needed.
        var AddonSettings;
    
        if ("lazy" in Module) {
          AddonSettings = Object.create(Module.lazy.AddonSettings);
        } else {
          AddonSettings = Object.create(Module.AddonSettings);
        }
        XPCOMUtils.defineLazyPreferenceGetter(AddonSettings, "REQUIRE_SIGNING", "xpinstall.signatures.required", false);
        XPCOMUtils.defineLazyPreferenceGetter(AddonSettings, "ALLOW_LEGACY_EXTENSIONS", "extensions.legacy.enabled", true);
        XPCOMUtils.defineLazyPreferenceGetter(AddonSettings, "LANGPACKS_REQUIRE_SIGNING", "extensions.langpacks.signatures.required", false);
    
        if ("lazy" in Module) {
          Module.lazy.AddonSettings = AddonSettings;
        } else {
          Module.AddonSettings = AddonSettings;
        }
    }
    
    // This is necessary to allow legacy add-ons via preferences.
    try {
      patchAddonSettings("resource://gre/modules/addons/XPIProvider.jsm");
    } catch (e) {
      // AddonSettings is not in this file starting with Firefox 61,
      // but it comes back in Firefox 74
    }
    
    try {
      patchAddonSettings("resource://gre/modules/addons/XPIDatabase.jsm");
    } catch (e) {
      // AddonSettings is not in this file until Firefox 61
    }
    
    // This override is needed to enable unsigned add-ons via preferences.
    patchAddonSettings("resource://gre/modules/addons/XPIInstall.jsm");
    
    // This override is needed to allow unsigned add-ons to show up without warning in about:addons.
    // (this is UI-only, the add-on is not actually disabled despite what the UI claims).
    patchAddonSettings("resource://gre/modules/addons/AddonSettings.jsm");
    
    Components.classes['@mozilla.org/consoleservice;1']
    .getService(Components.interfaces.nsIConsoleService)
    .logStringMessage("enablelegacy.cfg: the extensions.legacy.enabled preference is working again.");
    
    pref("xpinstall.signatures.required", false);// First line must be a comment.
    // In Firefox 55+, settings to configure add-on signing (and legacy add-ons) are stored in AddonSettings.jsm
    // The module exports an object with read-only properties, but that is not an issue since we can just replace
    // the exported object.
    // https://searchfox.org/mozilla-central/rev/2e08acdf8862e68b13166970e17809a3b5d6a555/toolkit/mozapps/extensions/internal/AddonSettings.jsm
    
    Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
    
    function patchAddonSettings(modulePath) {
        var Module = Components.utils.import(modulePath, {});
        // Note: we read the data from preferences instead of hard-coding a "true", so
        // that by default legacy add-ons are disabled. This enables the user to only
        // enable legacy add-ons for specific Firefox profiles when really needed.
        var AddonSettings;
    
        if ("lazy" in Module) {
          AddonSettings = Object.create(Module.lazy.AddonSettings);
        } else {
          AddonSettings = Object.create(Module.AddonSettings);
        }
        XPCOMUtils.defineLazyPreferenceGetter(AddonSettings, "REQUIRE_SIGNING", "xpinstall.signatures.required", false);
        XPCOMUtils.defineLazyPreferenceGetter(AddonSettings, "ALLOW_LEGACY_EXTENSIONS", "extensions.legacy.enabled", true);
        XPCOMUtils.defineLazyPreferenceGetter(AddonSettings, "LANGPACKS_REQUIRE_SIGNING", "extensions.langpacks.signatures.required", false);
    
        if ("lazy" in Module) {
          Module.lazy.AddonSettings = AddonSettings;
        } else {
          Module.AddonSettings = AddonSettings;
        }
    }
    
    // This is necessary to allow legacy add-ons via preferences.
    try {
      patchAddonSettings("resource://gre/modules/addons/XPIProvider.jsm");
    } catch (e) {
      // AddonSettings is not in this file starting with Firefox 61,
      // but it comes back in Firefox 74
    }
    
    try {
      patchAddonSettings("resource://gre/modules/addons/XPIDatabase.jsm");
    } catch (e) {
      // AddonSettings is not in this file until Firefox 61
    }
    
    // This override is needed to enable unsigned add-ons via preferences.
    patchAddonSettings("resource://gre/modules/addons/XPIInstall.jsm");
    
    // This override is needed to allow unsigned add-ons to show up without warning in about:addons.
    // (this is UI-only, the add-on is not actually disabled despite what the UI claims).
    patchAddonSettings("resource://gre/modules/addons/AddonSettings.jsm");
    
    Components.classes['@mozilla.org/consoleservice;1']
    .getService(Components.interfaces.nsIConsoleService)
    .logStringMessage("enablelegacy.cfg: the extensions.legacy.enabled preference is working again.");
    
    pref("xpinstall.signatures.required", false);
    
  2. Benennen Sie die Textdatei enablelegacy.cfg.
  3. Speichern Sie Folgendes in einer Textdatei:
    // First line must be a comment. 
    pref("general.config.filename", "enablelegacy.cfg");
    pref("general.config.obscure_value", 0);
    pref("general.config.sandbox_enabled", false);// First line must be a comment. 
    pref("general.config.filename", "enablelegacy.cfg");
    pref("general.config.obscure_value", 0);
    pref("general.config.sandbox_enabled", false);
  4. Benennen Sie die Textdatei enablelegacy-prefs.js.
  5. Suchen Sie das Firefox-Installationsverzeichnis, üblicherweise C:\Program Files\Mozilla Firefox.
  6. Kopieren Sie enablelegacy.cfg zu C:\Program Files\Mozilla Firefox.
  7. Kopieren Sie enablelegacy-prefs.js zu C:\Program Files\Mozilla Firefox\defaults\pref.
Note: Recent versions of Firefox, like 102.10 ESR, re-enable the extension automatically once the flag is set. In older versions such as 68.0.2 ESR, it may be necessary to reinstall the extension.
Note: Firefox older than 68.0.2 ESR does not work with our implementation of Group Policy installation. The following script is a fix to be executed after running our installers. Studio 25.10 or newer will fix the incompatibility.
# Define the registry path
$regPath = "HKLM:\SOFTWARE\Policies\Mozilla\Firefox\Extensions\Install"

function Convert-WindowsPathToFileUrl($path) {
    $unixPath = $path -replace '\\', '/'
    $escapedPath = $unixPath -replace ' ', '%20'
    return "file:///" + $escapedPath
}

function Fix-FirefoxProfile($prefsPath, $fileUrl) {
    if (-not (Test-Path $prefsPath)) {
        Write-Host "prefs.js not found: $prefsPath"
        return
    }

    Write-Host "Processing prefs.js: $prefsPath"

    $content = Get-Content -Path $prefsPath -Raw

    $pattern = 'user_pref\("browser\.policies\.runOncePerModification\.extensionsInstall",\s*"(.+?)"\);'

    if (-not ($content -match $pattern)) {
        Write-Host " -> No matching preference found in prefs.js."
        return
    }

    $jsonArrayString = $matches[1]

    # Unescape \" to "
    $jsonArrayStringUnescaped = $jsonArrayString -replace '\\\"', '"'

    try {
        $list = ConvertFrom-Json -InputObject $jsonArrayStringUnescaped
    } catch {
        Write-Host " -> Error parsing JSON inside prefs.js preference (after unescaping)."
        return
    }

    if (-not ($list -contains $fileUrl)) {
        Write-Host " -> File URL not present in extensionsInstall list."
        return
    }

    $newList = $list | Where-Object { $_ -ne $fileUrl }

    $newJsonArrayString = ($newList | ConvertTo-Json -Compress)

    # prefs.js expects it wrapped as a string, escaping " as \"
    $escapedNewJsonArrayString = $newJsonArrayString -replace '"', '\"'

    $newPrefLine = "user_pref(""browser.policies.runOncePerModification.extensionsInstall"", `"$escapedNewJsonArrayString`");"

    # Replace the old line
    $oldPrefLine = $matches[0]
    $content = $content -replace [regex]::Escape($oldPrefLine), $newPrefLine

    Set-Content -Path $prefsPath -Value $content -Encoding UTF8
    Write-Host " -> prefs.js updated."
}

function Fix-AllFirefoxProfiles($fileUrl) {
    $profilesPath = "$env:APPDATA\Mozilla\Firefox\Profiles"

    if (-not (Test-Path $profilesPath)) {
        Write-Host "Firefox profiles directory not found: $profilesPath"
        return
    }

    $profiles = Get-ChildItem -Path $profilesPath -Directory
    foreach ($profile in $profiles) {
        $prefsPath = Join-Path $profile.FullName "prefs.js"
        Fix-FirefoxProfile -prefsPath $prefsPath -fileUrl $fileUrl
    }
}

if (-not (Test-Path $regPath)) {
    Write-Host "Registry path not found: $regPath"
    return
}

$values = Get-ItemProperty -Path $regPath

foreach ($property in $values.PSObject.Properties) {
    $name = $property.Name
    $value = $property.Value

    if ($value -notmatch "^[a-zA-Z]:\\.*\\uipath-ff\.xpi$") {
        continue
    }

    Write-Host "Found Windows path for uipath-ff.xpi in entry '$name': $value"

    $fileUrl = Convert-WindowsPathToFileUrl $value
    Write-Host " -> Converted to file URL: $fileUrl"

    Set-ItemProperty -Path $regPath -Name $name -Value $fileUrl
    Write-Host " -> Updated registry key '$name'."

    Fix-AllFirefoxProfiles -fileUrl $fileUrl
}# Define the registry path
$regPath = "HKLM:\SOFTWARE\Policies\Mozilla\Firefox\Extensions\Install"

function Convert-WindowsPathToFileUrl($path) {
    $unixPath = $path -replace '\\', '/'
    $escapedPath = $unixPath -replace ' ', '%20'
    return "file:///" + $escapedPath
}

function Fix-FirefoxProfile($prefsPath, $fileUrl) {
    if (-not (Test-Path $prefsPath)) {
        Write-Host "prefs.js not found: $prefsPath"
        return
    }

    Write-Host "Processing prefs.js: $prefsPath"

    $content = Get-Content -Path $prefsPath -Raw

    $pattern = 'user_pref\("browser\.policies\.runOncePerModification\.extensionsInstall",\s*"(.+?)"\);'

    if (-not ($content -match $pattern)) {
        Write-Host " -> No matching preference found in prefs.js."
        return
    }

    $jsonArrayString = $matches[1]

    # Unescape \" to "
    $jsonArrayStringUnescaped = $jsonArrayString -replace '\\\"', '"'

    try {
        $list = ConvertFrom-Json -InputObject $jsonArrayStringUnescaped
    } catch {
        Write-Host " -> Error parsing JSON inside prefs.js preference (after unescaping)."
        return
    }

    if (-not ($list -contains $fileUrl)) {
        Write-Host " -> File URL not present in extensionsInstall list."
        return
    }

    $newList = $list | Where-Object { $_ -ne $fileUrl }

    $newJsonArrayString = ($newList | ConvertTo-Json -Compress)

    # prefs.js expects it wrapped as a string, escaping " as \"
    $escapedNewJsonArrayString = $newJsonArrayString -replace '"', '\"'

    $newPrefLine = "user_pref(""browser.policies.runOncePerModification.extensionsInstall"", `"$escapedNewJsonArrayString`");"

    # Replace the old line
    $oldPrefLine = $matches[0]
    $content = $content -replace [regex]::Escape($oldPrefLine), $newPrefLine

    Set-Content -Path $prefsPath -Value $content -Encoding UTF8
    Write-Host " -> prefs.js updated."
}

function Fix-AllFirefoxProfiles($fileUrl) {
    $profilesPath = "$env:APPDATA\Mozilla\Firefox\Profiles"

    if (-not (Test-Path $profilesPath)) {
        Write-Host "Firefox profiles directory not found: $profilesPath"
        return
    }

    $profiles = Get-ChildItem -Path $profilesPath -Directory
    foreach ($profile in $profiles) {
        $prefsPath = Join-Path $profile.FullName "prefs.js"
        Fix-FirefoxProfile -prefsPath $prefsPath -fileUrl $fileUrl
    }
}

if (-not (Test-Path $regPath)) {
    Write-Host "Registry path not found: $regPath"
    return
}

$values = Get-ItemProperty -Path $regPath

foreach ($property in $values.PSObject.Properties) {
    $name = $property.Name
    $value = $property.Value

    if ($value -notmatch "^[a-zA-Z]:\\.*\\uipath-ff\.xpi$") {
        continue
    }

    Write-Host "Found Windows path for uipath-ff.xpi in entry '$name': $value"

    $fileUrl = Convert-WindowsPathToFileUrl $value
    Write-Host " -> Converted to file URL: $fileUrl"

    Set-ItemProperty -Path $regPath -Name $name -Value $fileUrl
    Write-Host " -> Updated registry key '$name'."

    Fix-AllFirefoxProfiles -fileUrl $fileUrl
}

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