first commit

gif.js

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+function onClickHandler(info, tab) {
+	chrome.tabs.getSelected(null, function(tab) {
+		if (info.menuItemId == "copyGifUrl"){
+			chrome.tabs.sendMessage(tab.id, {command: info.menuItemId}, function(response) {
+				console.log(response.url);
+					var urlTextArea = document.createElement('textarea');
+					urlTextArea.value = response.url;
+					document.body.appendChild(urlTextArea);
+					urlTextArea.select();
+					document.execCommand('copy');
+					document.body.removeChild(urlTextArea);
+			});
+		}else if (info.menuItemId == "downloadGif"){
+			chrome.tabs.sendMessage(tab.id, {command: info.menuItemId});
+		}
+	});
+}
+
+chrome.contextMenus.onClicked.addListener(onClickHandler);
+
+chrome.runtime.onInstalled.addListener(function() {
+	chrome.contextMenus.create({"title": "Copy gif url to clipboard", "contexts": ["video"],
+															"id": "copyGifUrl",
+															"documentUrlPatterns": ["*://9gag.com/"]});
+	chrome.contextMenus.create({"title": "Download gif file", "contexts": ["video"],
+															"id": "downloadGif",
+															"documentUrlPatterns": ["*://9gag.com/"]});
+});

main.js

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+var currentVideo = null;
+
+jQuery("#list-view-2").on( "click", ".badge-evt.post-read-more", function( event ) {
+	actual = jQuery(event.target);
+	actual.parent().find("img").attr("src", actual.attr('href').replace("/gag/", "http://img-9gag-fun.9cache.com/photo/") + "_700b_v1.jpg");
+	actual.remove();
+	event.preventDefault();
+});
+
+jQuery( document ).ready(function() {
+	jQuery("#overlay-container").remove();
+});
+
+$("#list-view-2").on('contextmenu', "video", function(e) {
+	currentVideo = jQuery(event.target);
+});
+
+function downloadURI(uri, name) 
+{
+	var link = document.createElement("a");
+	link.download = "dsfsd";
+	link.href = uri;
+	link.click();
+}
+
+chrome.extension.onMessage.addListener(
+	function(request, sender, sendResponse) {
+		if (request.command == "copyGifUrl" || request.command == "downloadGif"){
+			url = currentVideo.parent().data("image").replace("a.gif", ".gif")
+		}
+		if (request.command == "copyGifUrl"){
+			sendResponse({url: url});
+		}else if (request.command == "downloadGif"){
+			console.log(currentVideo.parents("article").find("h2").text().trim());
+			downloadURI(url, currentVideo.parents("article").find("h2").text().trim() + ".gif");
+		}
+	}
+);
+

manifest.json

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+{
+	"manifest_version": 2,
+
+	"name": "Getting started example",
+	"description": "This extension shows a Google Image search result for the current page",
+	"version": "1.0",
+	"permissions" : [
+		"activeTab",
+		"contextMenus",
+		"clipboardWrite"
+		],
+	"content_scripts": [ {
+		"js": [ "jquery-2.1.4.min.js", "main.js" ],
+		"matches": ["http://9gag.com/*", "https://9gag.com/*"]
+	}],
+	"background": {
+		"persistent": false,
+		"scripts": ["gif.js"]
+	}
+}