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Questions tagged [firefox]

Mozilla Firefox is a free, open-source cross-platform web browser. Use this tag if your question is related to the inner workings of Firefox or if it relates to code that is not working on Firefox which does work in other browsers. Questions about Firefox add-on development should be tagged [firefox-addon]. If your question is about using Firefox for browsing (i.e. as an end user) you should ask your question on Super User instead.

Firefox is an open source, cross-platform web-browser created by Mozilla. It uses the open source rendering engine and the JavaScript engine.

Standards

Firefox implements many web standards, including (almost full ), , , , , (with extensions), (), , , , and (Animated PNG) images with transparency.

Platform availability

Firefox runs on various operating systems including , , , and , as well as on , and devices. Its source code is licensed under the Mozilla Public License.

There are various add-ons available for Firefox under various categories, such as web development, changing the appearance of Firefox and utilities such as download managers.

Resources

What questions should have this tag?

Use this tag if your question is related to:

  • Code that is not working on Firefox which does work in other browsers
  • The inner workings of Firefox

Questions concerning Firefox add-on development should be tagged .

If your question is about using Firefox for browsing (i.e. as an end user) rather than the development of code for Firefox, you should ask your question on Super User instead.

Related tags

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What is speculative parsing?

I've read that Firefox 3.5 has a new feature in its parser ? Improvements to the Gecko layout engine, including speculative parsing for faster content rendering. Could you explain that in simple terms.
Khaled Alshaya
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Javascript - Assigning multiple variables to object properties using curly braces in variable declaration

While looking at some Javascript code for Mozilla's (Firefox) Add-on SDK, I saw kind of variable declaration I hadn't seen before: var { foo, bar } = someFunction("whatever"); // just an example See those curly braces around the variable name?…
grant
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CSS3 rotate - rendering problems in Firefox and Safari

I'm trying to rotate a simple line of text by some degrees with the CSS3 property »rotate«, precisely by 1.5 degrees. -webkit-transform: rotate(1.5deg); -moz-transform: rotate(1.5deg); -ms-transform: rotate(1.5deg); -o-transform:…
Marcel Kalveram
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IE Conditional Comments and Chrome/Firefox

I am using the following IE conditional comment: This works great to keep the code from rendering in any IE lower than 8. However, this also keeps the code from rendering in Chrome and Firefox. Any…
Baxter
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Record Actions using Selenium

I have a semi-vague question to ask about Selenium. I've discovered a few different ways to perform actions using the FirefoxDriver. What I need to do is repeat actions that a user performs on a web page (clicking a link, checking a checkbox, etc.).…
user1294114
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How to run Firefox full screen in minimalist X environment

I wish to set up what is usually called a Kiosk, running Firefox locked down to our own specific home page (and links from there). The base operating system is CentOs 5 (i.e. just like RedHat Enterprise 5). Ideally I want Firefox to start full…
Nikki Locke
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When will the Javascript "for...of" loop be implemented in Chrome Chrome?

I just coded a function using the Javascript for...of loop, assuming it had been implemented in Chrome (as in Firefox 13).. It has not. Does anyone know where i can find out if, and when it is scheduled for implementation?
Lloyd
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YouTube player iframe API: playVideo doesn't work on Firefox 9.0.1

I've got some YouTube embedding code (I will paste only code which is causing the trouble for me and cut things which are not public): console.log(ytplayer); ytplayer.playVideo(); Console.log on Chrome and on FF shows me good objects with correct…
Karol
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jQuery and CSS Animations Choppy in Firefox

I'm working on a minisite that features a lot of jQuery animation. It works fine in Safari, Chrome & IE9, but the animation is really choppy in Firefox (7, 8 & 9) on OSX. I thought CSS animation would be smoother, so I adapted the iPad version of…
Jordan Acosta
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Selenium and Firefox 9's "Will you help improve Mozilla Firefox" popup

I'm trying to test a Java web app using Selenium 2.16.1. When Selenium opens Firefox, I see a band at the top of the page with message "Will you help improve Mozilla Firefox" For some reason this…
Rup
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Firefox Firebug Extension - Freeze Javascript Feature?

How can I freeze Javascript in firebug so that i can inspect the changes made by it in the html? If for example i have a jQuery rollover effect and i want to inspect the html code in that point in time. I believe Dreamweaver CS4 has this feature…
Ritchie
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Interactive Javascript console (preferably integrated with Firebug)

I'm looking for a way to have an interactive JIT debugger, preferably integrated with Firebug. I got the idea from PHPEd, which has an "Immediate" debug tab where you can just type in PHP code and modify objects on the fly. This makes debugging a…
Artem Russakovskii
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How do I make a file:// hyperlink that works in both IE and Firefox?

In my documentation web pages, I often need to provide links to locations, files and applications (.xbap) stored on the intranet. In IE, this works fine with URLs formatted like this: Go to…
Anthony Brien
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How to force Firefox to be the foreground application when testing with Selenium on Mac OS X

We recently started testing our Django-based application using Selenium. Tests run fine on Linux, but some fail on Mac OS X. We're using Firefox as the browser in both cases, and it took us a while (and some luck) to figure out that the important…
Greg Wilson
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Cannot set document.body.innerHTML of IFrame in Firefox

I've looked for a cross-browser way to programmatically set the innerHTML of an IFrame. (As in http://roneiv.wordpress.com/2008/01/18/get-the-content-of-an-iframe-in-javascript-crossbrowser-solution-for-both-ie-and-firefox/). I've written some…
Timothy Miller
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