Yes, you read well: thunderbird (not in Parabola). Still I think that some people may find it useful.

My system is currently dead, and I am using someone else's machine. Thunderbird 102.3.3 comes with search engines which are not easily removed. Therefore, the idea of sharing how to do it:

1. Open your profile folder
   1. Go to Help
   2. More Troubleshooting Information
   3. Search for profile directory
   4. Open directory
2. Replace comma separated values in chrome_debugger_profile/prefs.js
   1. Look for a line with something like this
      

      extensions.webextensions.uuids
      

   2. Delete (for example) amazon do not forget the comma (the value may be different for you)
      

      \"amazondotcom@search.mozilla.org\":\"b90a37bb-0150-47e8-b92e-2e502447d339\",
      

3. Replace comma separated values in prefs.js
   1. Look for a line with something like this
      

      extensions.webextensions.uuids
      

   2. Delete (for example) amazon do not forget the comma (the value may be different for you)
      

      \"amazondotcom@search.mozilla.org\":\"b90a37bb-0150-47e8-b92e-2e502447d339\",
      

4. Delete comma separated values in extension-preferences.json. For example, amazon. Do not forget the comma (the value may be different for you)
   

   "amazondotcom@search.mozilla.org":{"permissions":["internal:svgContextPropertiesAllowed","internal:privateBrowsingAllowed"],"origins":[]},
   

5. Delete braced and comma separated values in extensions.json. For example, amazon. Do not forget the comma (the value may be different for you)
   

   {"id":"amazondotcom@search.mozilla.org","syncGUID":"{xxxxx}","version":"1.1","type":"extension","loader":null,"updateURL":null,"installOrigins":null,"manifestVersion":2,"optionsURL":null,"optionsType":null,"optionsBrowserStyle":true,"aboutURL":null,"defaultLocale":{"name":"Amazon.com","description":"Amazon.com Search","creator":null,"developers":null,"translators":null,"contributors":null},"visible":true,"active":true,"userDisabled":false,"appDisabled":false,"embedderDisabled":false,"installDate":xxxxx,"applyBackgroundUpdates":1,"path":null,"skinnable":false,"sourceURI":null,"releaseNotesURI":null,"softDisabled":false,"foreignInstall":false,"strictCompatibility":true,"locales":[{"name":"Amazon.com","description":"Amazon.com Search","creator":null,"developers":null,"translators":null,"contributors":null,"locales":["en"]}],"targetApplications":[{"id":"toolkit@mozilla.org","minVersion":null,"maxVersion":null}],"targetPlatforms":[],"signedDate":null,"seen":true,"dependencies":[],"incognito":"spanning","userPermissions":{"permissions":[],"origins":[]},"optionalPermissions":{"permissions":[],"origins":[]},"icons":{"16":"favicon.ico"},"iconURL":null,"blocklistState":0,"blocklistURL":null,"startupData":{},"hidden":true,"installTelemetryInfo":null,"recommendationState":null,"rootURI":"resource://search-extensions/amazondotcom/","location":"app-builtin"},
   

The links (here)[https://labs.parabola.nu/issues/81] are dead.