firefox-webextensions

In reading about the File API and wanting to write data directly from an indexedDB database to the client disk instead of first building and holding a large blob in RAM to download to disk, there are a few basic items I'm not understanding. In the MDN documents these two statements are found: In Gecko, privileged code can create File objects representing any local file without user interaction. If you want to use the DOM File API in chrome code, you can do so without restriction. In fact, you get one bonus feature: you can create File objects specifying the path of the file on the user's

How can my content script detect a refresh of Google's search? I believe it is an AJAX reload of the page and not a "real" refresh, so my events won't detect the refresh. Is it possible to detect it somehow in both a Google Chrome extension and a Firefox WebExtensions add-on? Google search is a dynamically updated page. Several well-known methods exist to detect an update: MutationObserver , timer-based approach (see waitForKeyElements wrapper), and an event used by the site like pjax:end on GitHub. Luckily, Google Search in Chrome browser uses message event, so here's our content script:

I have a simple extension where I use Cu.import to import a JavaScript code module . But, when I load the extension, I get this error: Cu is not defined The code I was trying to use was: Cu.import("resource://gre/modules/MatchPattern.jsm"); Cu.import("resource://gre/modules/BrowserUtils.jsm"); var regExArray = []; var myArray = ["facebook.com", "google.com"]; var myURL="http://www.google.co.uk/?gfe_rd"; for (var x=0; x<myArray.length; x++) { console.log("loop: "+x); var match = new MatchPattern(/(http:\/\/)(.*\.)*(myArray[x])(\/.*)*(\/)*/); log("match result is: "+match.matches(myURL)); }//end

I'm talking about Chrome extensions, Firefox WebExtensions, Edge extensions... In a background script, not a content script, is there a clear way to know which browser I am using? I need to do different operations for different browsers. Yes, navigator.userAgent can be useful, but it's not very clear . Is there any extension API that can be used to do this? Something like, chrome.extension.browserType . (Of course, this one doesn't really exist..) Makyen There is no specific API to detect which browser is currently being used. One of the benefits of the major browsers moving to support a

I'm trying to write a small add-on for firefox using the WebExtensions structure. This add-on should read a local file content by it's absolute path: "/home/saba/desktop/test.txt" manifest.json { "manifest_version": 2, "name": "Test - load files", "version": "0.0.1", "description": "Test - load files", "permissions": [ "<all_urls>" ], "background": { "scripts": [ "main.js" ] } } Here what I tried so far (inside the main.js): Using XMLHttpRequest function readFileAjax(_path){ var xhr = new XMLHttpRequest(); xhr.onloadend = function(event) { console.log("onloadend", this); }; xhr