Bug 801066 - s/Unknown Origin/this local file/ in permission prompts when scheme is file. r=pbz,fluent-reviewers,bolsson

Differential Revision: https://phabricator.services.mozilla.com/D197821

browser/actors/WebRTCParent.sys.mjs

@@ -571,11 +571,18 @@ function prompt(aActor, aBrowser, aRequest) {
     reqAudioOutput,
     !!aRequest.secondOrigin
   );
-  const message = localization.formatValueSync(stringId, {
-    origin: "<>",
-    thirdParty: "{}",
-  });
-
+  let message;
+  let originToShow;
+  if (principal.schemeIs("file")) {
+    message = localization.formatValueSync(stringId + "-with-file");
+    originToShow = null;
+  } else {
+    message = localization.formatValueSync(stringId, {
+      origin: "<>",
+      thirdParty: "{}",
+    });
+    originToShow = lazy.webrtcUI.getHostOrExtensionName(principal.URI);
+  }
   let notification; // Used by action callbacks.
   const actionL10nIds = [{ id: "webrtc-action-allow" }];
 
@@ -714,7 +721,7 @@ function prompt(aActor, aBrowser, aRequest) {
   }
 
   let options = {
-    name: lazy.webrtcUI.getHostOrExtensionName(principal.URI),
+    name: originToShow,
     persistent: true,
     hideClose: true,
     eventCallback(aTopic, aNewBrowser, isCancel) {

browser/locales/en-US/browser/webrtcIndicator.ftl

@@ -139,6 +139,20 @@ webrtc-allow-share-camera-and-audio-capture = Allow { $origin } to use your came
 webrtc-allow-share-screen-and-microphone = Allow { $origin } to use your microphone and see your screen?
 webrtc-allow-share-screen-and-audio-capture = Allow { $origin } to listen to this tab’s audio and see your screen?
 
+## Special phrasing for sharing devices when the origin is a file url.
+
+webrtc-allow-share-audio-capture-with-file = Allow this local file to listen to this tab’s audio?
+webrtc-allow-share-camera-with-file = Allow this local file to use your camera?
+webrtc-allow-share-microphone-with-file = Allow this local file to use your microphone?
+webrtc-allow-share-screen-with-file = Allow this local file to see your screen?
+# "Speakers" is used in a general sense that might include headphones or
+# another audio output connection.
+webrtc-allow-share-speaker-with-file = Allow this local file to use other speakers?
+webrtc-allow-share-camera-and-microphone-with-file = Allow this local file to use your camera and microphone?
+webrtc-allow-share-camera-and-audio-capture-with-file = Allow this local file to use your camera and listen to this tab’s audio?
+webrtc-allow-share-screen-and-microphone-with-file = Allow this local file to use your microphone and see your screen?
+webrtc-allow-share-screen-and-audio-capture-with-file = Allow this local file to listen to this tab’s audio and see your screen?
+
 ## Variables:
 ##   $origin (String): the first party origin.
 ##   $thirdParty (String): the third party origin.