--- a/toolkit/components/extensions/parent/ext-browserSettings.js
+++ b/toolkit/components/extensions/parent/ext-browserSettings.js
@@ -460,33 +460,29 @@ this.browserSettings = class extends Ext
         ),
         useDocumentFonts: Object.assign(
           getSettingsAPI(
             extension, "useDocumentFonts",
             () => {
               let prefValue = Services.prefs.getIntPref("browser.display.use_document_fonts");
               if (prefValue === 0) {
                 return "never";
-              } else if (prefValue === 2) {
-                return "always";
               }
-              return "allow_pages_own_fonts";
+              return "use";
             }
           ),
           {
             set: details => {
-              if (!["allow_pages_own_fonts", "always", "never"].includes(details.value)) {
+              if (!["never", "use"].includes(details.value)) {
                 throw new ExtensionError(
                   `${details.value} is not a valid value for useDocumentFonts.`);
               }
               let prefValue = 1; // initialize to 1 - allow pages to choose their own fonts
               if (details.value === "never") {
                 prefValue = 0;
-              } else if (details.value === "always") {
-                prefValue = 2;
               }
               return ExtensionPreferencesManager.setSetting(
                 extension.id, "useDocumentFonts", prefValue);
             },
           }
         ),
       },
     };

--- a/toolkit/components/extensions/test/xpcshell/test_ext_browserSettings.js
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_browserSettings.js
@@ -220,21 +220,18 @@ add_task(async function test_browser_set
   await testSetting(
     "overrideDocumentColors", "always",
     {"browser.display.document_color_use": 2});
 
   await testSetting(
     "useDocumentFonts", "never",
     {"browser.display.use_document_fonts": 0});
   await testSetting(
-    "useDocumentFonts", "allow_pages_own_fonts",
+    "useDocumentFonts", "use",
     {"browser.display.use_document_fonts": 1});
-  await testSetting(
-    "useDocumentFonts", "always",
-    {"browser.display.use_document_fonts": 2});
 
   async function testProxy(config, expectedPrefs) {
     // proxyConfig is not supported on Android.
     if (AppConstants.platform === "android") {
       return Promise.resolve();
     }
 
     let proxyConfig = {