--- a/browser/modules/webrtcUI.jsm
+++ b/browser/modules/webrtcUI.jsm
@@ -722,18 +722,18 @@ function prompt(aBrowser, aRequest) {
 
       this.mainAction.callback = function(aState) {
         let remember = aState && aState.checkboxChecked;
         let allowedDevices = [];
         let perms = Services.perms;
         if (videoDevices.length) {
           let listId = "webRTC-select" + (sharingScreen ? "Window" : "Camera") + "-menulist";
           let videoDeviceIndex = doc.getElementById(listId).value;
-          let allowCamera = videoDeviceIndex != "-1";
-          if (allowCamera) {
+          let allowVideoDevice = videoDeviceIndex != "-1";
+          if (allowVideoDevice) {
             allowedDevices.push(videoDeviceIndex);
             // Session permission will be removed after use
             // (it's really one-shot, not for the entire session)
             perms.add(uri, "MediaManagerVideo", perms.ALLOW_ACTION,
                       perms.EXPIRE_SESSION);
             if (!webrtcUI.activePerms.has(aBrowser.outerWindowID)) {
               webrtcUI.activePerms.set(aBrowser.outerWindowID, new Set());
             }
@@ -742,19 +742,16 @@ function prompt(aBrowser, aRequest) {
               if (device.deviceIndex == videoDeviceIndex) {
                 webrtcUI.activePerms.get(aBrowser.outerWindowID)
                         .add(aRequest.windowID + device.mediaSource + device.id);
                 break;
               }
             }
             if (remember)
               SitePermissions.set(uri, "camera", SitePermissions.ALLOW);
-          } else {
-            let scope = remember ? SitePermissions.SCOPE_PERSISTENT : SitePermissions.SCOPE_TEMPORARY;
-            SitePermissions.set(uri, "camera", SitePermissions.BLOCK, scope, aBrowser);
           }
         }
         if (audioDevices.length) {
           if (!sharingAudio) {
             let audioDeviceIndex = doc.getElementById("webRTC-selectMicrophone-menulist").value;
             let allowMic = audioDeviceIndex != "-1";
             if (allowMic) {
               allowedDevices.push(audioDeviceIndex);
@@ -766,19 +763,16 @@ function prompt(aBrowser, aRequest) {
                 if (device.deviceIndex == audioDeviceIndex) {
                   webrtcUI.activePerms.get(aBrowser.outerWindowID)
                           .add(aRequest.windowID + device.mediaSource + device.id);
                   break;
                 }
               }
               if (remember)
                 SitePermissions.set(uri, "microphone", SitePermissions.ALLOW);
-            } else {
-                let scope = remember ? SitePermissions.SCOPE_PERSISTENT : SitePermissions.SCOPE_TEMPORARY;
-                SitePermissions.set(uri, "microphone", SitePermissions.BLOCK, scope, aBrowser);
             }
           } else {
             // Only one device possible for audio capture.
             allowedDevices.push(0);
           }
         }
 
         if (!allowedDevices.length) {