Install: Copy from 'javascript:' onwards, and paste into a bookmark. Usage: Triple click filename in github and click bookmark

rawgit-bookmarklet.js

// javascript:
(function() {
function getSelectionHtml() {
    var html = "";
    if (typeof window.getSelection != "undefined") {
        var sel = window.getSelection();
        if (sel.rangeCount) {
            var container = document.createElement("div");
            for (var i = 0, len = sel.rangeCount; i < len; ++i) {
                container.appendChild(sel.getRangeAt(i).cloneContents());
            }
            html = container.innerHTML;
        }
    } else if (typeof document.selection != "undefined") {
        if (document.selection.type == "Text") {
            html = document.selection.createRange().htmlText;
        }
    }
    return html;
}

var rex = /<a href="\/(.+?)\/(.+?)\/(?!releases\/)(?:(?:blob|raw)\/)?(.+?)\/([^"]+)"/i;
var sel = getSelectionHtml();
var val = sel.match(rex);
var res = val ? 'Copy URL:\nhttps://rawgit.com/'+val[1]+'/'+val[2]+'/'+val[3]+'/'+val[4] 
		          : "Triple click file to select, then click this bookmarklet";
console.log("RES", val, res);
alert(res);
res = null;
}())