fix(tests): Fix avatar test adding FF condition.

tests/specs/3way/avatars.spec.ts

@@ -122,9 +122,21 @@ describe('Avatar', () => {
         await p1.getParticipantsPane().assertVideoMuteIconIsDisplayed(p2);
 
         // Start the third participant
-        await ensureThreeParticipants(ctx);
+        await ensureThreeParticipants(ctx, {
+            skipInMeetingChecks: true
+        });
+
         const { p3 } = ctx;
 
+        // When the first participant is FF because of their audio mic feed it will never become dominant speaker
+        // and no audio track will be received by the third participant and video is muted,
+        // that's why we need to do a different check that expects any track just from p2
+        if (p1.driver.isFirefox) {
+            await Promise.all([ p2.waitForRemoteStreams(1), p3.waitForRemoteStreams(1) ]);
+        } else {
+            await Promise.all([ p2.waitForRemoteStreams(2), p3.waitForRemoteStreams(2) ]);
+        }
+
         // Pin local video and verify avatars are displayed
         await p3.getFilmstrip().pinParticipant(p3);