On Linux, if the user enters a remote URL in the Open File Dialog, the proxy can be bypassed. In Tor Browser, we added the following patch: https://torpat.ch/18101 and here's the original ticket: https://trac.torproject.org/18101 We would like to propose uplifting this patch, perhaps behind a flag.

Hi Mike and Karl, would you be able to review these? The first patch adds the general "--enable-proxy-bypass-protection" build flag, and the second patch is specifically for the linux file dialog.

Comment on attachment 8946325 [details] [diff] [review] 0001-Bug-1433357-Part-1-Add-proxy-bypass-protection-flag.patch Review of attachment 8946325 [details] [diff] [review]: ----------------------------------------------------------------- ::: old-configure.in @@ +4213,5 @@ > dnl ======================================================== > +dnl enable proxy bypass protection > +dnl ======================================================== > +MOZ_ARG_ENABLE_BOOL(proxy-bypass-protection, > +[ --enable-proxy-bypass-protection Enable proxy bypass protection], It would be better to put all this in python configure. This should go in toolkit/moz.configure, and could look like: option('--enable-proxy-bypass-protection', help='...') @depends_if('--enable-proxy-bypass-protection') def proxy_bypass_protection(_): return True set_config('MOZ_PROXY_BYPASS_PROTECTION', proxy_bypass_protection) set_define('MOZ_PROXY_BYPASS_PROTECTION', proxy_bypass_protection)

Comment on attachment 8946328 [details] [diff] [review] 0002-Bug-1433357-Part-2-Suppress-upload-file-dialog-proxy.patch Please place the preprocessor directives and comment around the whole mAllowURLs test and block to indicate that the whole block becomes irrelevant. Please include more context in future patches: That can be done by including this in ~/.hgrc or .hg/hgrc: [diff] git = true showfunc = 1 unified = 8

(In reply to Mike Hommey [:glandium] from comment #3) Thanks for the review here's a new version with the code you proposed.

(In reply to Karl Tomlinson (:karlt) from comment #4) Thanks, Karl. Here's a new version with the changes you suggested.

(Oops, trying again.)

(Replacing incorrect file.)

Thanks!

Pushed by cbrindusan@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/b5ad0c384202 Part 1: Add proxy bypass protection flag r=glandium https://hg.mozilla.org/integration/mozilla-inbound/rev/bd385579481b Part 2: Suppress upload-file-dialog proxy bypass in Linux r=karlt

https://hg.mozilla.org/mozilla-central/rev/b5ad0c384202 https://hg.mozilla.org/mozilla-central/rev/bd385579481b