Ability to turn off the "Download this track" feature - on a per track basis - is requested. One of the requirements for our instance of GBrowse (new DGV) is to prohibit users from downloading a track of DECIPHER data, due to consent restrictions. Users are allowed to view the data in the track, but are not permitted to download this track. Policy enforced by DECIPHER stipulates that users must make special request to DECIPHER to obtain these data.
This is functionality that has also been requested by another GBrowse user. Additionally, it would be beneficial to turn off the "Download this track" feature for those tracks that may be supported by very large files (e.g. dbSNP data), which could impact server performance, potentially causing server outage.