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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

38740 questions
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Export all network traffic on a webpage

I'm looking for a tool that would list all the network information that a html dom (javascript etc as well) page loads. Exeactly what chrome shows on the developer tools/Network tab. I've tried the Chromium-browser under ubutu to export this data…
Vincent
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"Stray doctype" error in firefox source code viewer

Since I learned to serve XHTML pages as XML, I have started noticing something odd: whenever I view an XHTML page in the Firefox source code viewer, the DOCTYPE is always marked as an error. According to the tooltip I get from mousing over it, the…
Slartibartfast
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Amazon S3 CORS headers only show during OPTIONS (preflight) and not during GET request

I have an S3 bucket with the following CORS config. * …
reconbot
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2 answers

Save client generated data as file in JavaScript in chunks

I'm developing a FileShare application with webRTC. I want to implement the client in JavaScript/HTML. The code should be run on the clients browser. I need to save them when downloaded via webRTC. The files can be quite big and I can't completely…
David Feurle
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7 answers

Export all http requests on a specific page to txt/csv

I use SIEGE to test my web server performance. For a more realistic test the best way to go would be to have SIEGE hit the web page (website.com/our-company) and all static assets (.css, .js, .png, .jpg). Everything that you see on the firefox /…
ddutra
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Firefox: drawImage(video) fails with NS_ERROR_NOT_AVAILABLE: Component is not available

Trying to call drawImage with a video whose source is a webcam feed seems to fail in Firefox with an NS_ERROR_NOT_AVAILABLE: Component is not available. I have tried to wait for every event the video tag fires: play, playing, canplay, loadeddata,…
Achal Dave
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5 answers

Hiding default select arrow in Firefox 22

Following this answer https://stackoverflow.com/a/17713753/407943 I've tried implementing the same solution but it does not work on my Windows 7 Firefox 22, this is what I get: select { -moz-appearance: window; -webkit-appearance: none; …
Or Weinberger
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2 answers

Firefox adding page breaks before large div block when printing

I have a bit of logic in one of my Rails views that states if the table I'm about to print is over 7 rows, create a div around the table with a min-height style to make sure the footer below this table goes to the end of the page 2, rather than page…
user2203451
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1 answer

CSS pointer-events='none' and/or XUL mousethrough='always' in web pages for Firefox

Very recently I asked this question on how to pass clicks through an element (e.g. full screen overlaying ). Received some good advice, but I still wondered which browsers supported this natively... For those skipping the previous link, the overlay…
LeslieOA
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Why does this jQuery AJAX PUT work in Chrome but not FF

In Chrome this does an HTTP PUT just like it should, but in FireFox 21 it doesn't. There are no errors in the javascript console or in the backend. Here is the HTML:
Lurk21
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1 answer

CORS synchronous requests not working in firefox

The official documentation of jQuery ( async ajax section ) says that: Cross-domain requests and dataType: "jsonp" requests do not support synchronous operation. However this works in all recent browsers but firefox version >= 20. Here is the…
mfreitas
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console.log(array) shows different array contents than iterating the array and displaying the individual elements

I have the following code: console.log("start"); for(var i = 0; i < array.length; i++){ console.log(i + " = " + array[i]); } console.log(array); console.log("end"); This gives me the following output: [16:34:41.171] start [16:34:41.171] 0 =…
user1302914
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8 answers

How to limit Javascript's window.find to a particular DIV?

Is it possible to use Javascript in Safari/Firefox/Chrome to search a particular div container for a given text string. I know you can use window.find(str) to search the entire page but is it possible to limit the search area to the div…
101010110101
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XmlHttpRequest.onload not called

I'm playing around with this XmlHttpRequest thing. In some tutorials and books, it is the onload function the one that is called when the request is done. In my little experiment, this function is never called. Here's my code: window.onload =…
Mister Smith
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