1344617 - Clicking on a link in page source sometimes displays gibberish instead of downloading/displaying file

Status: RESOLVED DUPLICATE of bug 472417

(Toolkit :: View Source, defect)

Description

[bfd-3v0]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0
Build ID: 20170125094131

Steps to reproduce:

- Go to the following page and press CTRL+U to display the source.

  https://www.w3.org/2010/05/video/mediaevents.html

- Identify the movie source link:

  <source id='mp4' src="https://media.w3.org/2010/05/sintel/trailer.mp4" type='video/mp4'>

  and click on the mp4 link.


An alternative way to trigger the problem is to simply type in the address bar:

view-source:https://media.w3.org/2010/05/sintel/trailer.mp4



Actual results:

The browser follows the link and displays strange characters.


Expected results:

The movie should be displayed in a player, or clicking on the link should trigger the movie download. This happens for other movie extensions as well.

I suspect this is related to #1089357, but I don't know how I can check the headers when following links this way.