#Firefox window goes black install#

Search for and click it to toggle to вЂњfalse,вЂќ and itвЂ™ll stop sending this request.

In the address bar, type вЂњabout:configвЂќ then click through the warning. ThereвЂ™s an вЂњadvancedвЂќ setting that can disable this, but nothing exposed in the UI. A captive portal is that sign-in page you get at hotels and airports when you try to browse the Internet, where you have to log in or agree to terms or some such. And the response is just the word вЂњsuccessвЂќ вЂ“ whatвЂ™s it doing? According to, this is a way for Firefox to detect if itвЂ™s running behind a captive portal. By default, Firefox sends an HTTP GET to every 60 seconds. The first (and last) request was the one that got my attention and started me down this road. Ten Minutes, No User Action, Twelve Domains I added the Burp CA certificate so Firefox wouldnвЂ™t complain about the certificates Burp would generate, and so I could still connect to the sites using HSTS.ДЄfter ten minutes of just letting the browser sit there, IвЂ™d captured 52 HTTP requests to 12 unique domains.

#Firefox window goes black install#

I set up a fresh install of Firefox version 53.0 with no plugins or add-ons, and told it to connect through Burp Suite. IвЂ™m going to show you what I learned about keeping Firefox quieter, and IвЂ™ll give you a file you can use yourself to take care of all this stuff automatically when you set up a new installation. I found some other Firefox users complaining about the same things, and I followed those steps, but they didnвЂ™t cover everything. The last straw was this вЂњdetectportalвЂќ thing that seemed to be showing up every 60 seconds. I was having to scroll around way more than I used to while trying to make sense of the traffic. On a recent webapp test, I got a little frustrated with all the extra HTTP requests showing up in my Burpsuite Proxy History from connections that Firefox was making on its own.