Adobe Flash Does Not Cleanup Per-Page
It appears that Adobe Flash does not cleanup after each page is finished with the player object.
This is easily tested using a Playlist on YouTube. Allow the playlist to contiously play and Firefox's memory usage will grow per-page load. It seems that after the page is finished and moved on from that the Flash cache/object does not cleanup after itself and the memory is just left behind.
After about 30 minutes of listening to a music playlist Firefox is using over 1gig of RAM.
It appears that Adobe Flash does not cleanup after each page is finished with the player object.
This is easily tested using a Playlist on YouTube. Allow the playlist to contiously play and Firefox's memory usage will grow per-page load. It seems that after the page is finished and moved on from that the Flash cache/object does not cleanup after itself and the memory is just left behind.
After about 30 minutes of listening to a music playlist Firefox is using over 1gig of RAM.