More info related to the change: https://hg.mozilla.org/mozilla-central/rev/5079bb7577182734823d6e4a3c468115d45a9dd9

diff -Nru firefox-109.0.1+build1-0ubuntu0.22.04.1~mt1+11.0trisquel94/browser/components/search/extensions/ddg/manifest.json firefox-109.0+build2/browser/components/search/extensions/ddg/manifest.json
--- firefox-109.0.1+build1-0ubuntu0.22.04.1~mt1+11.0trisquel94/browser/components/search/extensions/ddg/manifest.json	2023-01-29 00:04:37.557029994 -0600
+++ firefox-109.0+build2/browser/components/search/extensions/ddg/manifest.json	2023-01-14 12:40:57.000000000 -0600
@@ -2,7 +2,7 @@
   "name": "DuckDuckGo",
   "description": "Search DuckDuckGo",
   "manifest_version": 2,
-  "version": "1.3",
+  "version": "1.2",
   "browser_specific_settings": {
     "gecko": {
       "id": "ddg@search.mozilla.org"
@@ -21,7 +21,7 @@
       "name": "DuckDuckGo",
       "search_url": "https://duckduckgo.com/",
       "search_form": "https://duckduckgo.com/?q={searchTerms}",
-      "search_url_get_params": "t=ffab&q={searchTerms}",
+      "search_url_get_params": "q={searchTerms}",
       "suggest_url": "https://ac.duckduckgo.com/ac/",
       "suggest_url_get_params": "q={searchTerms}&type=list"
     }
diff -Nru firefox-109.0.1+build1-0ubuntu0.22.04.1~mt1+11.0trisquel94/browser/components/search/extensions/ddg-html/manifest.json firefox-109.0+build2/browser/components/search/extensions/ddg-html/manifest.json
--- firefox-109.0.1+build1-0ubuntu0.22.04.1~mt1+11.0trisquel94/browser/components/search/extensions/ddg-html/manifest.json	2023-01-29 00:04:37.509029685 -0600
+++ firefox-109.0+build2/browser/components/search/extensions/ddg-html/manifest.json	2023-01-14 12:40:57.000000000 -0600
@@ -2,7 +2,7 @@
   "name": "DuckDuckGo (HTML)",
   "description": "Search DuckDuckGo (HTML)",
   "manifest_version": 2,
-  "version": "1.3",
+  "version": "1.2",
   "browser_specific_settings": {
     "gecko": {
       "id": "ddg-html@search.mozilla.org"
@@ -21,7 +21,7 @@
       "name": "DuckDuckGo (HTML)",
       "search_url": "https://html.duckduckgo.com/html/",
       "search_form": "https://html.duckduckgo.com/html/?q={searchTerms}",
-      "search_url_get_params": "t=ffab&q={searchTerms}",
+      "search_url_get_params": "q={searchTerms}",
       "suggest_url": "https://ac.duckduckgo.com/ac/",
       "suggest_url_get_params": "q={searchTerms}&type=list"
     }