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I get an error TypeError: Services.wm is undefined, when I use Firefox Addon SDK (JPM), and the fol… Read more Services.wm Is Undefined (firefox Sdk Extension)

I have the following scenario: A user can paste html content in a wysiwyg editor. When that pasted … Read more How To Find Specific Cache Entries In Firefox And Turn Them Into A File Or Blob Object?

Is it possible to grab user's selected text within Hotkey's scope? Defined in Addon/lib/mai… Read more Access Selected Text Within A Hotkey Object

I am struggling with adding a button to a table cell. The button should fire a function by calling … Read more How To Append A Button With Onclick Event That Fires A Function To A Table Cell

I'm quite new to addon development with firefox. I picked the addon sdk for porting my chrome e… Read more Firefox Addon Sdk: Ways To Display Options To User?

For many reasons, I have to open up XUL in a tab, instead of using a standard window. I wish to sen… Read more Customevent() To An Xul Tab - Firefox Addon

I am making a short research about Chrome and Firefox extensions. I can access the manifest.json fi… Read more How To Access The Manifest.json File Of A Firefox Extension?

I've been trying to add the highlighting feature to the Firefox DevTools debugger, so it will h… Read more How Do I Get Firefox Debugger Watch's Target Element?

I have a weird bug in my addon, the addon itself needs to add a request header parameters for a spe… Read more Firefox Addon Observer Http-on-modify-request Not Working Properly

I have recently converted a GreaseMonkey script of mine into a WebExtension, just to get a first im… Read more Firefox Webextension: How Do I Run Code Prior To Disable/uninstall?

I am currently creating a WebExtension in which I register a listener on the web requests being mad… Read more Update Webextension Webrequest.onbeforerequest Listener Url Settings From Separate Script

I'm taking a foray into Firefox extension development for the first time, and so far it's b… Read more How To Overwrite Built In Xpcom Component In Firefox Addon?

I am writing what should be a fairly straightforward firefox extension. But this is my first firef… Read more How Does Javascript Execution Context Work In Firefox Extensions With Multiple Windows?

I am developing a virtual keyboard extension for Firefox. One of the features of this extension is … Read more Event.keycode Alternative

How can I access firefox extension data from javascript code injected directly to the page? I´m loo… Read more How Can I Access Firefox Extension Resources

I am trying to develop a Firefox extension which involves copying an image to the clipboard. In the… Read more Firefox Webextension Alternative To Addon Clipboard Sdk For Copying Images

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

I want to trigger events from a Firefox extension, specifically click events. I've tried jQuery… Read more Trigger Events From Firefox Browser Extension?

I'm using firefox addon builder. Running this code errors with 'callback is not defined'… Read more Jsonp Callback Error

I am porting my Chrome extension over to Firefox. It has a paste to clipboard function. But, I have… Read more Copy Text To Clipboard From Background Script In A Firefox Webextension