Screen sharing extension failed to install on Firefox

[QasimK]

I am running Firefox 62.0.3 (64-bit) with no extensions on Arch Linux with SwayWM (Wayland), and I get the error "Screen sharing extension failed to install" when I try to share my screen from https://meet.jit.si

[saghul]

Are you using a UserAgent spoofing extensión of any kind? There is no meed for an extension on Firefox so you shouldn’t be seeing that.

[QasimK]

Nope nothing like that, my user agent is: Mozilla/5.0 (X11; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0. Also, screen sharing worked fine the last time I tried it about 2 months ago on this same computer (running the same OS/browser).

If it is helpful, I also cannot video/audio - other users see "Jitsi user is having connection issues", and I just don't see them, but this shouldn't affect my ability to start a screen share, right?

[saghul]

I'll try to repro, thanks for the feedback.

[saghul]

Hum, I tried on my Fedora 28 machine and worked no problem. My UA is: "Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0". Can you please paste the contents of your JS console since the start of the call?

[QasimK]

Here you go (unfortunately I don't know how to give you nicely formatted/coloured logs):

[modules/RTC/RTCUtils.js] <value/<>:  Available devices:  
Array(5) [ MediaDeviceInfo, MediaDeviceInfo, MediaDeviceInfo, MediaDeviceInfo, MediaDeviceInfo ]
lib-jitsi-meet.min.js:2:148840
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://as.atlassian.com/api/v1/t. (Reason: CORS request did not succeed).[Learn More]
Loading failed for the <script> with source “https://meet.jit.si/libs/analytics-ga.js”. meet.jit.si:1
[react/features/analytics/functions.js] <t.a/</<>:  Failed to load https://meet.jit.si/libs/analytics-ga.js: [object Event] app.bundle.min.js:2:509263
[react/features/analytics/functions.js] <t.a/</<>:  Failed to load https://meet.jit.si/libs/jitsi-analytics-web-client.min.js: [object Event] app.bundle.min.js:2:509263
[modules/statistics/AnalyticsAdapter.js] <value>:  Disposing of analytics adapter. lib-jitsi-meet.min.js:2:148840
Loading failed for the <script> with source “https://meet.jit.si/libs/jitsi-analytics-web-client.min.js”. meet.jit.si:1
[react/features/base/storage/PersistenceRegistry.js] <value>:  redux state persisted. 3a0786e598e84c7aa0887ebd5dddb3c0 -> 108ad07f26be3b30cd82702f2aea1620 app.bundle.min.js:2:509263
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://as.atlassian.com/api/v1/t. (Reason: CORS request did not succeed).[Learn More]
(TIME) index.html loaded:    534 ScaryWizardsGrowAnxiously:12:9
(TIME) Sending external connect XHR:     546 external_connect.js:65:5
[modules/browser/BrowserCapabilities.js] <t>:  This appears to be firefox, ver: 62.0 lib-jitsi-meet.min.js:2:148840
(TIME) external connect XHR done:    966 external_connect.js:40:13
Error: "XMLHttpRequest error. Status: 502. Error message: Bad Gateway"
onreadystatechangehttps://cdn.jitsi.net/meetjitsi_3056.1430/libs/external_connect.js?v=1:49:32 do_external_connect.js:77:13
[react/index.web.js] <>:  (TIME) document ready:     1637 app.bundle.min.js:2:509263
[react/features/base/storage/PersistenceRegistry.js] <value>:  redux state rehydrated as 
Object { "features/base/settings": {…}, "features/dropbox": {}, "features/recent-list": (7) […], "features/welcome": {}, "features/calendar-sync": {}, "features/video-layout": {}, "features/base/known-domains": (6) […] }
app.bundle.min.js:2:509263
[modules/UI/videolayout/VideoLayout.js] <changeUserAvatar>:  Missed avatar update - no small video yet for undefined app.bundle.min.js:2:509263
[react/features/calendar-sync/functions.web.js] <t.a>:  No calendar type available app.bundle.min.js:2:509263
[react/features/base/media/middleware.js] <>:  Start muted: app.bundle.min.js:2:509263
[react/features/base/media/middleware.js] <>:  Start audio only set to false app.bundle.min.js:2:509263
[react/features/base/conference/middleware.js] <>:  Audio-only disabled app.bundle.min.js:2:509263
[modules/RTC/RTCUtils.js] <value>:  Using the new gUM flow lib-jitsi-meet.min.js:2:148840
[modules/xmpp/xmpp.js] <value>:  P2P STUN servers:  
Array(3) [ {…}, {…}, {…} ]
lib-jitsi-meet.min.js:2:148840
[modules/xmpp/xmpp.js] <value>:  (TIME) Strophe connecting:  1807 lib-jitsi-meet.min.js:2:148840
[modules/RTC/RTCUtils.js] <value/r<>:  Got media constraints:  
Object { video: {…}, audio: {…} }
lib-jitsi-meet.min.js:2:148840
[modules/RTC/RTCUtils.js] <value/<>:  Available devices:  
Array(5) [ MediaDeviceInfo, MediaDeviceInfo, MediaDeviceInfo, MediaDeviceInfo, MediaDeviceInfo ]
lib-jitsi-meet.min.js:2:148840
[react/features/analytics/functions.js] <t.a/</<>:  Loaded 2 analytics handlers app.bundle.min.js:2:509263
[modules/RTC/RTCUtils.js] <value/</<>:  onUserMediaSuccess lib-jitsi-meet.min.js:2:148840
[modules/RTC/JitsiLocalTrack.js] <value>:  Setting new MSID: {68b9cf3c-d2c7-404e-94b4-3727ac8e5472} {94d17fe3-3b91-4623-a2cf-5ebfc91c7f94} on LocalTrack[undefined,audio] lib-jitsi-meet.min.js:2:148840
[modules/RTC/JitsiLocalTrack.js] <value>:  Setting new MSID: {1ce8952a-e436-47bc-8cc0-3102948cf07d} {0dddb327-e417-4084-84ba-ffd17c989c1e} on LocalTrack[undefined,video] lib-jitsi-meet.min.js:2:148840
[modules/xmpp/xmpp.js] <value>:  (TIME) Strophe connected:   3596 lib-jitsi-meet.min.js:2:148840
[modules/xmpp/xmpp.js] <value>:  My Jabber ID: 3c09a260-7473-45e0-b3ef-2db6ea95fe5b@meet.jit.si/9beb46fd-de13-4ef6-8e6b-88216804de12 lib-jitsi-meet.min.js:2:148840
[conference.js] <init/<>:  initialized with 2 local tracks app.bundle.min.js:2:509263
[modules/xmpp/ChatRoom.js] <t>:  Joined MUC as scarywizardsgrowanxiously@conference.meet.jit.si/3c09a260 lib-jitsi-meet.min.js:2:148840
[modules/e2eping/e2eping.js] <e>:  Initializing e2e ping; pingInterval=10000, analyticsInterval=60000. lib-jitsi-meet.min.js:2:148840
[modules/connectivity/ParticipantConnectionStatus.js] <e>:  RtcMuteTimeout set to: 2000 lib-jitsi-meet.min.js:2:148840
[modules/statistics/AvgRTPStatsReporter.js] <e>:  Avg RTP stats will be calculated every 15 samples lib-jitsi-meet.min.js:2:148840
[JitsiConference.js] <r>:  backToP2PDelay: 5 lib-jitsi-meet.min.js:2:148840
[modules/videosipgw/VideoSIPGW.js] <e>:  creating VideoSIPGW lib-jitsi-meet.min.js:2:148840
[react/features/base/storage/PersistenceRegistry.js] <value>:  redux state persisted. 108ad07f26be3b30cd82702f2aea1620 -> 9b222203f96c90bd20d213bb5fa69287 app.bundle.min.js:2:509263
[JitsiConference.js] <r.prototype._doReplaceTrack>:  _doReplaceTrack - no JVB JingleSession lib-jitsi-meet.min.js:2:148840
[JitsiConference.js] <r.prototype._doReplaceTrack>:  _doReplaceTrack - no P2P JingleSession lib-jitsi-meet.min.js:2:148840
[JitsiConference.js] <r.prototype._doReplaceTrack>:  _doReplaceTrack - no JVB JingleSession lib-jitsi-meet.min.js:2:148840
[JitsiConference.js] <r.prototype._doReplaceTrack>:  _doReplaceTrack - no P2P JingleSession lib-jitsi-meet.min.js:2:148840
[modules/remotecontrol/RemoteControl.js] <value>:  Initializing remote control. app.bundle.min.js:2:509263
[modules/xmpp/moderator.js] <i.prototype.setFocusUserJid>:  Focus jid set to:  undefined lib-jitsi-meet.min.js:2:148840
[modules/xmpp/moderator.js] <i.prototype.createConferenceIq>:  Session ID: null machine UID: 1e1f86fac4a479fe2408c6015b33143d lib-jitsi-meet.min.js:2:148840
[react/features/base/tracks/actions.js] <t.c/</</<>:  Replace audio track - unmuted app.bundle.min.js:2:509263
[react/features/base/tracks/actions.js] <t.c/</</<>:  Replace video track - unmuted app.bundle.min.js:2:509263
[conference.js] <updateAudioIconEnabled>:  Microphone button enabled: true local audio: LocalTrack[1,audio] audio devices:  device count: 0 app.bundle.min.js:2:509263
[conference.js] <updateVideoIconEnabled>:  Camera button enabled: true local video: LocalTrack[2,video] video devices:  device count: 0 app.bundle.min.js:2:509263
[conference.js] <updateAudioIconEnabled>:  Microphone button enabled: true local audio: LocalTrack[1,audio] audio devices: [object MediaDeviceInfo],[object MediaDeviceInfo],[object MediaDeviceInfo] device count: 3 app.bundle.min.js:2:509263
[conference.js] <updateVideoIconEnabled>:  Camera button enabled: true local video: LocalTrack[2,video] video devices: [object MediaDeviceInfo],[object MediaDeviceInfo] device count: 2 app.bundle.min.js:2:509263
[modules/xmpp/strophe.ping.js] <value>:  XMPP pings will be sent every 10000 ms lib-jitsi-meet.min.js:2:148840
[modules/statistics/CallStats.js] <value>:  CallStats Status: err=success msg=SDK authentication successful. lib-jitsi-meet.min.js:2:148840
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
[modules/xmpp/moderator.js] <i.prototype.setFocusUserJid>:  Focus jid set to:  focus@auth.meet.jit.si lib-jitsi-meet.min.js:2:148840
[modules/xmpp/moderator.js] <i.prototype.parseConfigOptions>:  Authentication enabled: false lib-jitsi-meet.min.js:2:148840
[modules/xmpp/moderator.js] <i.prototype.parseConfigOptions>:  External authentication enabled: false lib-jitsi-meet.min.js:2:148840
[modules/xmpp/moderator.js] <i.prototype.parseConfigOptions>:  Sip gateway enabled:  true lib-jitsi-meet.min.js:2:148840
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
[modules/xmpp/ChatRoom.js] <value>:  entered scarywizardsgrowanxiously@conference.meet.jit.si/focus 
Object { affiliation: "owner", role: "moderator", jid: "focus@auth.meet.jit.si/focus154762358583646", isFocus: true, isHiddenDomain: false }
lib-jitsi-meet.min.js:2:148840
[modules/xmpp/ChatRoom.js] <value>:  Ignore focus: scarywizardsgrowanxiously@conference.meet.jit.si/focus, real JID: focus@auth.meet.jit.si/focus154762358583646 lib-jitsi-meet.min.js:2:148840
[modules/UI/UI.js] <w.initEtherpad>:  Etherpad is enabled app.bundle.min.js:2:509263
[modules/version/ComponentsVersions.js] <r.prototype.processPresence/<>:  Got xmpp version: Prosody(trunk nightly build 747 (2017-02-19, 428d4abee723),Linux) lib-jitsi-meet.min.js:2:148840
[modules/version/ComponentsVersions.js] <r.prototype.processPresence/<>:  Got focus version: JiCoFo(1.0.1.0-437,Linux) lib-jitsi-meet.min.js:2:148840
[conference.js] <_setupListeners/<>:  My role changed, new role: moderator app.bundle.min.js:2:509263
[JitsiConference.js] <r.prototype._maybeStartOrStopP2P>:  Auto P2P disabled lib-jitsi-meet.min.js:2:148840
[modules/xmpp/ChatRoom.js] <value>:  (TIME) MUC joined:  4985 lib-jitsi-meet.min.js:2:148840
[modules/xmpp/ChatRoom.js] <value>:  Subject is changed to lib-jitsi-meet.min.js:2:148840
[modules/UI/videolayout/LargeVideoManager.js] <value/<>:  hover in %s 3c09a260 app.bundle.min.js:2:509263
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details
Using more than two STUN/TURN servers slows down discovery callstats-ws.min.js:3458
ICE failed, add a STUN server and see about:webrtc for more details

After I try screen sharing:

[modules/RTC/RTCUtils.js] <value>:  Using the new gUM flow lib-jitsi-meet.min.js:2:148840
[modules/RTC/RTCUtils.js] <value>:  Get media constraints 
Object { audio: false, video: {…} }
lib-jitsi-meet.min.js:2:148840
[modules/RTC/RTCUtils.js] <value/</<>:  Failed to get access to local media.  NotFoundError: The object can not be found here. [object Object] lib-jitsi-meet.min.js:2:148840
[react/features/base/tracks/functions.js] <t.a/<>:  Failed to create local tracks 
Array [ "desktop" ]
Object { gum: {…}, name: "gum.not_found", message: "Requested device(s) was/were not found: screen", stack: "r@https://cdn.jitsi.net/meetjitsi_3056.1430/libs/lib-jitsi-meet.min.js?v=3056.1430:2:86260\nvalue/</<@https://cdn.jitsi.net/meetjitsi_3056.1430/libs/lib-jitsi-meet.min.js?v=3056.1430:2:112553\n" }
app.bundle.min.js:2:509263
[conference.js] <_handleScreenSharingError>:  failed to share local desktop 
Object { gum: {…}, name: "gum.not_found", message: "Requested device(s) was/were not found: screen", stack: "r@https://cdn.jitsi.net/meetjitsi_3056.1430/libs/lib-jitsi-meet.min.js?v=3056.1430:2:86260\nvalue/</<@https://cdn.jitsi.net/meetjitsi_3056.1430/libs/lib-jitsi-meet.min.js?v=3056.1430:2:112553\n" }
app.bundle.min.js:2:509263 

[saghul]

Hum. That's weird. Can you please try this test page by Mozilla themselves? https://mozilla.github.io/webrtc-landing/gum_test.html

[saghul]

Also, here, can you expand the object so that I can see the video constraints?

[modules/RTC/RTCUtils.js] <value>:  Get media constraints 
Object { audio: false, video: {…} }

[hrotkogabor]

I started the electron version, through an X2go login. The fullscreen sharing seems to work, but when I try to share a window, I get the message in a red box: "Oops! Screen sharing extension failed to install." I can't get any details even when I start the app from the commandline.

[saghul]

@hrotkogabor This has nothing to do with Firefox.

[QasimK]

@saghul

On the test page:

• Audio: OK
• Video: OK
• Audio + Video: OK

On the following tests it suggests to set media.getusermedia.screensharing.enabled=true which I can confirm is already set. It also notes media.getusermedia.screensharing.allowed_domains, but that setting does not exist (by default anyway).

• Screen: BAD - Only option (on browser permissions dialog pop-up) is Entire Screen which is black and I can only see the cursor.
• Window: ERROR - "NotFoundError: The object can not be found here."
• Application: ERROR - "NotFoundError: The object can not be found here."

Object:

{
  "audio": false,
  "video": {
    "mozMediaSource": "window",
    "mediaSource": "window",
    "frameRate": {
      "min": 5,
      "max": 5
    }
  }
}

I want to emphasise again that meet.jit.si was working fine a couple of months ago using the same OS/Window Manager/Browser, though of course I've updated versions since then. I love Jitsi Meet, so I hope this can be fixed.

[saghul]

@QasimK To be honest I'm not sure what to suggest :cry: If not even Mozila's own test page works, I don't know what else to try...

Do you have any extensions? Can you try a new user profile just to see if a blank slate works?

Also, you are not using Wayland, right?

[QasimK]

There are no extensions installed, but I can give a new user profile a go.

I am using Wayland...

[saghul]

Has that changed since last time you tested? I wonder if the screencapture is not working because of that... do you have a way to test with X? (that doesn't involve too much trouble, that is)

[daimoc]

Hi Qasimk, what was your exact Firefox working version 2 month ago ?

Firefox Screencapture code for linux changed 3 month ago to fix a deadlock with xserver (https://bugzilla.mozilla.org/show_bug.cgi?id=1456101), it could be related.

If you observe issue with the Firefox test page, you should log Firefox errors (https://wiki.mozilla.org/Media/WebRTC/Logging) and fill a bug report on https://bugzilla.mozilla.org/.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[QasimK]

Hi @daimoc, I tested Jitsi again just now (Firefox v64.0, SwayWM v0.15.2) and it seems to work again.. I will close this issue.

Thank you @saghul @daimoc for investigating.