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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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'innerText' works in IE, but not in Firefox

I have some JavaScript code that works in IE containing the following: myElement.innerText = "foo"; However, it seems that the 'innerText' property does not work in Firefox. Is there some Firefox equivalent? Or is there a more generic, cross…
Ray
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How can I prevent the backspace key from navigating back?

On IE I can do this with the (terribly non-standard, but working) jQuery if ($.browser.msie) $(document).keydown(function(e) { if (e.keyCode == 8) window.event.keyCode = 0;}); But is it possible to do in a way which works on Firefox, or in a…
erikkallen
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How can I inspect disappearing element in a browser?

How can I inspect an element which disappears when my mouse moves away? I don't know its ID, class or anything but want to inspect it. Solutions I have tried: Run jQuery selector inside console $('*:contains("some text")') but didn't have any luck…
lukas.pukenis
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What do {curly braces} around javascript variable name mean

EDIT After looking at JSHint I found this 'destructuring expression' is available in ES6 (use esnext option) or Mozilla JS extensions (use moz) and this however after reading it I still don't understand why it is used I have come across the…
Georgi Georgiev
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Edit and replay XHR chrome/firefox etc?

I have been looking for a way to alter a XHR request made in my browser and then replay it again. Say I have a complete POST request done in my browser, and the only thing I want to change is a small value and then play it again. This would be a lot…
madsobel
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How to verify an XPath expression in Chrome Developers tool or Firefox's Firebug?

How can I verify my XPath? I am using Chrome Developers tool to inspect the elements and form my XPath. I verify it using the Chrome plugin XPath Checker, however it does not always give me the result. What is a better way to verify my XPath. I have…
user3448242
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Hide Up & Down Arrow Buttons (Spinner) in Input Number - Firefox 29

On Firefox 28, I'm using works great because it brings up the numerical keyboard on input fields which should only contain numbers. In Firefox 29, using number inputs displays spin buttons at the right side of the field, which…
NereuJunior
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Take a full page screenshot with Firefox on the command-line

I'm running Firefox on a Xvfb in a VPS. What I want to do is to take a full page screenshot of the page. I can redirect Firefox to particular page using firefox http://google.com and take a screenshot (inside X) using ImageMagick import root…
Omar Abid
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Cryptic "Script Error." reported in Javascript in Chrome and Firefox

I have a script that detects Javascript errors on my website and sends them to my backend for reporting. It reports the first error encountered, the supposed line number, and the time. EDIT to include doctype:
Mike Sherov
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How to allow keyboard focus of links in Firefox?

Go to this ultra-simple fiddle in a Webkit browser and click on on of the inputs: http://jsfiddle.net/eK4TT/ my first link my second link my…
Ben
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Firefox redirects to https

I'm using Firefox, and while setting up a server, I have been fiddling around with redirects. Now, Firefox has cached a 301 redirect from http://example.com/ to https://example.com/ and from http://sub.example.com/ to https://sub.example.com/. I've…
talouv
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CSS @font-face not working with Firefox, but working with Chrome and IE

The following code works in Google Chrome beta as well as IE 7. However, Firefox seems to have a problem with this. I'm suspecting it to be a problem of how my CSS files are included, cause I know Firefox is not too friendly about cross-domain…
KG -
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How to get HTML 5 input type="date" working in Firefox and/or IE 10

I find it odd that input type="date" is still not supported in Firefox after all of this time. In fact, I don't think they added in much (if any) of the HTML 5 new types on an input element. Not surprised that it is not supported in IE10. So,…
Solomon Closson
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How to view/delete local storage in Firefox?

In Google Chrome there is an easy way to see what's in local storage as well as modify or delete it after inspecting it. Is there a way to do the same in Firefox?
Ryan
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Faster way to develop and test print stylesheets (avoid print preview every time)?

This is my process right now: Save changes to print.css Open browser and refresh page. Right-click and choose Print > Print Preview (Firefox, but any browser really) It's step 3 that bugs me and I'm wondering if it's possible to cut it out of the…
Michael
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