User Agent: Mozilla/5.0 (X11; Linux i686; rv:34.0) Gecko/20100101 Firefox/34.0 Build ID: 20100101194537 Steps to reproduce: In FireFox the extension it is impossible to register an event handler to communicating with the server over TLS. Also it is impossible to register an event handler to DNS resolve Actual results: 1. http-on-opening-request and http-on-modify-request events no security information for TLS connection and IP (and connection is not establiched) 2. http-on-examine-response the connection is established and secure information is accessible. But http-headers and data already sended. Expected results: I want to 1. After "http-on-modify-request" must occurred an event that will allow to determine the IP-address to which connection. Ideally, if event will have the ability to set the allowed TLS suites and the allowed TLS versions for this request. 2. After the TLS connection established and before a HTTP data sended must occured an event. Should be available the same information as in "http-on-examine-response", including the IP address of the connection and certificates. This will allow to an extension: 1. To abandon the connection with an unfamiliar IP-address. 2. To allow older version of the TLS Protocol for the site, but disallow it for all other sites. 3. To allow only specific root Certificate or intermediate certificate. 4. To cancel for sending the http information if not satisfied with the strong of the TLS-connection.

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258