1806967 - [MPRIS/MediaSession Integration] Cannot seek or get position of tracks in Firefox using MPRIS on Linux

Status: RESOLVED DUPLICATE of bug 1659199

(Firefox :: Untriaged, enhancement)

Description

[[:nickname] Spectre]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:108.0) Gecko/20100101 Firefox/108.0

Steps to reproduce:

With playerctl installed in any Linux distribution that supports MPRIS

1. Open Firefox and play any sort of media (I played a Youtube video and a Spotify song in my tests)
2. Run "playerctl position" (Playerctl is a command line program that can be installed from most distribution software repositories which can control MPRIS-enabled media players such as Firefox)
3. Run "playerctl position 5+"
4. Run "busctl --user introspect org.mpris.MediaPlayer2.firefox."Your Instance Number" /org/mpris/MediaPlayer2"

Actual results:

For 2 and 3, both of them return "No player could handle this command."

For 4, it returns a list of the properties of the MediaPlayer2 service in which the org.mpris.MediaPlayer2.Player interface has null values for the property .Position and a false value for the property .CanSeek. This indicates that Firefox currently doesn't support these features.

Expected results:

2. Should return the position of the current track in seconds
3. Should seek forward 5 seconds in the current track
4. The .Position property should be populated with the position in the track and the .CanSeek property should be set to true instead of false