User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0 Build ID: 20180323154952 Steps to reproduce: - Use a server that does not support byte range requests for streaming (e.g. an MP4 video with web profile supported in Firefox, IE, Chrome) - Play the video and wait ~30-60 seconds - After that time video will stop playing (videojs throws exception "Code 2 - MEDIA_ERR_NETWORK) Actual results: Video playback is broken as video will interrupt after some time. Expected results: Video should have played fine until the end. - In the past Firefox did a good job with servers not supporting byte range requests (video was playing fine, seekbar allowed to jump forward/backward within the "buffered" / already downloaded part) - Internet Explorer works 100% fine, you can also jump in the seekbar to parts not yet shown as downloaded - Chrome plays fine with constraint that one cannot jump forward backward when clicking on the seekbar of a html5 video player, but at least the video does not interrupt.

one more comment: this was working fine in previous firefox versions and has was getting a problem in the recent Firefox version.

(In reply to df from comment #1) > one more comment: this was working fine in previous firefox versions and has > was getting a problem in the recent Firefox version. You may want to try mozregression-gui to find regression range. Downloads = https://github.com/mozilla/mozregression/releases FAQ = https://mozilla.github.io/mozregression/quickstart.html

Sounds like a duplicate of bug 1450607 which already has a regression bug identified. Do you happen to have link to repro this?

Can you provide an example URL to such site? thank you.

(In reply to Nils Ohlmeier [:drno] from comment #3) > Sounds like a duplicate of bug 1450607 which already has a regression bug > identified. it isn't a dup of 1450607 in such that the site provide does support range-request in that bug