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I am uploading a file as part of the change event of my input file control via AJAX and FormData. … Read more Firefox Ajax Post W/ Formdata Never Completes

I'm working on a web application and I'd like to add some keyboard shortcuts. Things like … Read more Available Keyboard Shortcuts For Web Applications

Is there a way to force a web browser, i.e. Firefox or Firefox Mobile (latest versions) to update a… Read more Force Browser To Update Cached Html5 Video Object

I am learning html5 and want to try to play on speakers what I say on microphone. So I wrote the fo… Read more Html5: Play On Speakers Stream From Microphone On Ubuntu

In my Firefox extension I want to add a JS file to the page. I tried to do that by adding to the pa… Read more Firefox Extension: Load Script From Chrome:// Url Into Page

I need it for my firefox extension. I don't care about waiting the page load completely, I want… Read more A Way To Observe Url In Urlbar Of Firefox, And Get An Event Every Time It Changes

When do browsers download the sourcemap for a minified file? I am struggling to find documentation … Read more When Do Browsers Download Sourcemaps?

I'm learning HTML5 and Javascript and I'm trying to draw an image on a canvas. I have the f… Read more Why Is The Image Drawn In The Canvas When Debugging But Not When Running?

I store some info in cookies in my Javascript code. I have had no problem to set and read them from… Read more Getting Cookies From Local Drive In Javascript Using Firefox Quantum

I am loading a local instance of localForage and using it with Promise chains to save basic data. A… Read more Localforage Setitem/getitem Unreliable In Firefox / Firestorage Plus

I wrote a custom right-click menu thing for my website. Firefox automatically does spellchecking an… Read more Javascript: I Have A Custom Right-click Menu But Still Want The Spellcheck!

hi im pretty much a beginner.I need some help turning this script in an browser extension for firef… Read more Convert Javascript Into Firefox Extension

Read more Textbox Onkeypress In Firefox Not Working

Okay, so, the problem I am facing is this: my mobile Firefox browser is not retrieving the correct … Read more Wrong Value For Window.innerwidth During Onload Event In Firefox For Android?

My code is this: jQuery('.cart-module .cart-heading').bind('click', function() { … Read more Jquery Slidetoggle() Not Working In Firefox, Works In Chrome

Hi i'm beginner and i want to create a web-app and needs help in fullscreen when page is Load..… Read more How To Initialize Fullscreen Without User Interaction

I need to convert image that are in a webpage to base64 over greasemonkey or firefox .xpi extension… Read more Convert Image To Base64 Javascript On Firefox

A noob at firefox extension development here. Is there a way to find Tab object from a given nsIDOM… Read more How To Get Tab From Nsidomwindow?

I'm developing a mobile app which runs a simple HTTP server and a WebView. The WebView displays… Read more Display Javascript "same Origin Policy" Violations

I within a panel and I want to get the current browser URL. Nothing so far works. Here's what I… Read more Getting Current Browser Url In Firefox Addon