I'm especially interested in disabling T button.
Disable keyboard shortcuts on Github?
github;keyboard shortcuts
Basically copying answer from superuser.com linked by Tom Woodward in comments. I've only changed keycode and url. It's Greasemonkey script which disables T shortcut. Supported by major browsers (extension like Greasemonkey for Firefox/Tampermonkey for Chrome may be needed/useful).// Your code here...// ==UserScript==// @name           Disable keyboard shortcuts// @description    Stop websites from highjacking keyboard shortcuts//// @run-at         document-start// @include        *github.com*// @grant          none// ==/UserScript==keycodes = [84] // Keycode for 'T', add more keycodes to disable other key capturesdocument.addEventListener('keydown', function(e) {//    alert(e.keyCode); //uncomment to find out the keycode for any given key    if (keycodes.indexOf(e.keyCode) != -1)    {        e.cancelBubble = true;        e.stopImmediatePropagation();    }    return false;});