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Hello,

I am using Ubuntu 14.04 with the default Firefox 29.0 browser. This used
to work fine for me in Ubuntu 12.04 but since I upgraded to Ubuntu 14.04
I am getting this problem that whenever I try to open the page
https://www.youtube.com/ (note that this is https), Firefox displays
some "looking up" or "contacting" message at the bottom of the screen
for an instant and then everything just goes blank. Even the address bar
no longer contains the address which I had entered (i.e.
https://www.youtube.com/).

I then tried installing the Chromium web browser and the behaviour was
identical in Chromium too. I then installed the "links" browser and
tried to open the secure YouTube site in the terminal and "links" was
able to successfully open the site and display the text on the page.

Everything else works fine in Firefox, I am able to open other sites
including secure pages like https://en.wikipedia.org/. It is only
YouTube which is causing this problem.

Update: I have found a workaround for this problem. I compared the
Wireshark log of packets between my Windows and Ubuntu systems and
noticed that the Windows Firefox was using TLS 1.0 and the Ubuntu one
was using TLS 1.2. On Ubuntu, the YouTube server successfully completed
the TLS 1.2 handshake but sent an RST right after the handshake when my
machine tried to send it some "application data". So I went into
Firefox's "about:config" and set "security.tls.version.max" to 0
(default was 3). This resolved the problem although I think it's not a
proper fix. Either something is wrong with Ubuntu's TLS 1.2 support or
with the YouTube server.

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
-- 
TLS problem when using Firefox to open secure YouTube page
https://bugs.launchpad.net/bugs/1328046
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