Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Difference between PAC reutrn "DIRECT" and Firefox' "no proxy for"?

  • 1 reply
  • 1 has this problem
  • 20 views
  • Last reply by guigs

crunth
crunth
more options

I'm trying to run a local IPython Notebook [1] in Firefox with a proxy-auto-config (PAC). It opens under http://localhost:8888/ I get an error message just as stated in [2] about a websocket connection failing (also when changing to http://127.0.0.1:8888/). Changing the advanced network properties to manual proxy settings with "no proxy for localhost, 127.0.0.1", the error disappears. I think that means Firefox tries to use a proxy for localhost when the PAC file is the active setting. I looked into the file and found

function FindProxyForURL(url, host)

{

if (shExpMatch(url, "http*://localhost/*")) return "DIRECT";

if (shExpMatch(url, "http*://localhost:*/*")) return "DIRECT";

if (shExpMatch(url, "http*://127.*.*.*/*")) return "DIRECT";

}

So, if I understand this correctly, Firefox shouldn't be using a proxy for localhost, but I get a different behavior than if I use the manual setting ignoring localhost and 127.0.0.1 -- why is that? There is no other mention of localhost in the PAC file. The user of stackoverflow in [2] has noticed the same problem.

I also tried in safe mode, no difference.

[1] http://ipython.org/notebook.html

[2] http://stackoverflow.com/questions/19245200/ipython-notebook-websocket-connection-failed

Using Firefox ESR 31.5.3 with Windows 7

I'm trying to run a local IPython Notebook [1] in Firefox with a proxy-auto-config (PAC). It opens under http://localhost:8888/ I get an error message just as stated in [2] about a websocket connection failing (also when changing to http://127.0.0.1:8888/). Changing the advanced network properties to manual proxy settings with "no proxy for localhost, 127.0.0.1", the error disappears. I think that means Firefox tries to use a proxy for localhost when the PAC file is the active setting. I looked into the file and found function FindProxyForURL(url, host) { if (shExpMatch(url, "http*://localhost/*")) return "DIRECT"; if (shExpMatch(url, "http*://localhost:*/*")) return "DIRECT"; if (shExpMatch(url, "http*://127.*.*.*/*")) return "DIRECT"; } So, if I understand this correctly, Firefox shouldn't be using a proxy for localhost, but I get a different behavior than if I use the manual setting ignoring localhost and 127.0.0.1 -- why is that? There is no other mention of localhost in the PAC file. The user of stackoverflow in [2] has noticed the same problem. I also tried in safe mode, no difference. [1] http://ipython.org/notebook.html [2] http://stackoverflow.com/questions/19245200/ipython-notebook-websocket-connection-failed Using Firefox ESR 31.5.3 with Windows 7

Modified by crunth

All Replies (1)

guigs
guigs
more options

Hi crunth , It might be helpful to direct this to the right audience: If you can reproduce it, please file a bug in bugzilla.mozilla.org under ESR and talk to the mailing list listed: 

*https://www.mozilla.org/en-US/firefox.../releasenotes/