If you are creating a web app that targets recent mobile phones and newer versions of browsers (Firefox 5+, Chrome 4+, Safari 4+, iOS Safari 3+, Android 2.1+), you can use the following code to create an awesome event for the insertion of dom nodes, and it even runs on the nodes initially part of … Read more
You have to add ping pong method Create a code in server when receive __ping__ send __pong__ back JavaScript code is give below function ping() { ws.send(‘__ping__’); tm = setTimeout(function () { /// —connection closed /// }, 5000); } function pong() { clearTimeout(tm); } websocket_conn.onopen = function () { setInterval(ping, 30000); } websocket_conn.onmessage = function … Read more
There are a multitude of ways to interact with page scripts, the most common of which are covered in the official documentation, including all of the ways listed in the question. Please read “Interacting with page scripts”. However, it should be pointed out that interacting with page scripts in a secure fashion can be hard. … Read more
If you have control over the iframe page (and the pages are on the same domain name), a strategy could be as follows: In the parent document, initialize a variable var iFrameLoaded = false; When the iframe document is loaded, set this variable in the parent to true calling from the iframe document a parent’s … Read more
If you look into the console messages, this is what you should see: downloadable font: download not allowed (font-family: “FontAwesome” style:normal weight:normal stretch:normal src index:0): bad URI or cross-site access not allowed Unfortunately for you, web fonts are subject to the same-origin policy which can only be relaxed via CORS. This means that there is … Read more
Content scripts do not have access the API you are using You are attempting to do this from a content script. You need to be doing this from a background script. Content scripts have access to a small subset of the WebExtensions APIs. The available APIs include (from the MDN Content Scripts page): From extension: … Read more
No, you can’t do this with user/page JavaScript. I imagine it would be a security risk, if you could. But there is an add-on you can install that will generate a printable, copyable list of installed extensions/Add-ons. Check out: “Extension List Dumper”.
Your code While you added a switch statement to switch on button, you never defined button, nor changed its state. You also did not have a default case, just in case the button variable was not one of the values for which you were testing in your case statements. You should not be using browserAction.setPopup() … Read more
This is called destructuring assignment. It is a feature of JavaScript 1.7, where in this context “JavaScript” refers to Mozilla’s specific extensions to the ECMAScript standard. It is slated for inclusion in the next version of JavaScript. The equivalent ECMAScript 5 code would be var __temp = require(‘chrome’); var Cc = __temp.Cc; var Ci = … Read more
This does the trick on Windows: function getUser() { return Components.classes[“@mozilla.org/process/environment;1”].getService(Components.interfaces.nsIEnvironment).get(‘USERNAME’); }