commit a91cf5fa9be89c32948f72b87819ff08c43a360e Author: Fernando Fernandez Mancera ffmancera@riseup.net Date: Fri Feb 2 11:38:01 2018 +0100

Bug 22614: Make e10s/non-e10s Tor Browsers indistinguishable

e10s in its current form probably brings some fingerprinting risks with it. E.g. users of accessibility tools (not only those users) won't have e10s enabled on windows and macOS. In order to solve this issue "dom.disable_window_showModalDialog" is set to "true". --- browser/app/profile/000-tor-browser.js | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/browser/app/profile/000-tor-browser.js b/browser/app/profile/000-tor-browser.js index ca27504e4b7d..eb26de046874 100644 --- a/browser/app/profile/000-tor-browser.js +++ b/browser/app/profile/000-tor-browser.js @@ -181,7 +181,8 @@ pref("dom.maxHardwareConcurrency", 1); // Bug 21675: Spoof single-core cpu pref("dom.w3c_touch_events.enabled", 0); // Bug 10286: Always disable Touch API // Disable randomised Firefox HTTP cache decay user test groups (Bug: 13575) pref("browser.cache.frecency_experiment", -1); - +// Make e10s/non-e10s Tor Browsers indistinguishable (Bug: 22614) +pref("dom.disable_window_showModalDialog", true);

// Third party stuff pref("privacy.firstparty.isolate", true); // Always enforce first party isolation