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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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Workaround for file input label click (Firefox)

In Firefox 7 it is not possible to trigger the open file dialog by clicking on the label. This SO question is very similar but that's green checked with it's a bug in FF. I'm looking…
Mårten Wikström
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Using Add-on SDK to add toolbar buttons? Integrating XUL and Add-on SDK for Firefox Add-ons?

I have already coded most of a Firefox add-on using the Add-on SDK API. I am now discovering that Add-on SDK might not be powerful enough for my purposes. I need two things: A drop down button in the toolbar next to the location bar. To modify the…
Salami
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Embed Firefox/Gecko in WPF/C#

I want to embed the current Gecko in my WPF-Project. I know there is the possibility with the Winforms-Host and the Skybound-Gecko-Library. But I do not use the standard wpf-theme for my application. It is another and the scrollbar of the control…
0xDEADBEEF
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Selenium, how to start Firefox with addons?

I want to load the Firefox Addon RequestPolicy. This is how i tried it: rp = open(wd + "/requestpolicy.xpi") firefoxProfile = FirefoxProfile() firefoxProfile.add_extension(rp) self.driver = webdriver.Firefox(firefoxProfile) self.usr =…
jgillich
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Firefox prints extra blank page

I have a web page that prints correctly on Chrome, Safari and IE, but has the followign problem on Firefox: It prints just the header on the first page. The rest of it is blank. The actual content is shown only on page 2. Googling a bit about it i…
memical
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JS and type.match as file mime type - need advice

Today I faced an interesting thing as FF File API and separate files by their types. OK here is a little snippet as if (!input.files[0].type.match('image.*')) { window.alert("Select image please"); return; } it…
user592704
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Why Firefox and other browsers perform oppositely when calculating which number is bigger?

Two days ago, when I found jsperf.com which has a collection of many javascript performance tests, I browsed several tests. One of tests was this, which compares Math.min(a,b) vs a
JiminP
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Selenium2 firefox: use the default profile

Selenium2, by default, starts firefox with a fresh profile. I like that for a default, but for some good reasons (access to my bookmarks, saved passwords, use my add-ons, etc.) I want to start with my default profile. There is supposed to be a…
Darren Cook
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How to dock Firebug in browser window?

How to dock Firebug in browser window after I opened in a new window? With Firefox 3.0.8 and Firebug 1.3 on Mac OS X 10.5 I can't get it docked in the browser window back. :(
Marc
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javascript: How to debug keyboard events

Imagine a web application which uses custom keyboard event handlers which might do event bubbling - or event catching. Is there a way (e.g. Firefox/Firebug addon) to debug each keystroke/keyboard event, something like: displaying the event type and…
MRalwasser
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TypeError: WebDriver.__init__() got an unexpected keyword argument 'firefox_options' error using firefox_options as arguments in Selenium Python

I'm trying to create a script which downloads a file from a website and for this I want to change the download filepath. When I try to do this with the Firefox options it gives me this error: TypeError: WebDriver.__init__() got an unexpected keyword…
jonathangilbert
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Insecure CSP value "'unsafe-eval'" in directive 'script-src'

while trying to load a third-party js file into content scripts in chrome extension. I'm facing an unsafe-eval error My manifest.json looks like this { "manifest_version": 3, "name": "Test", "version": "1.0", "host_permissions":…
Syntax Hacker
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How to debug Firefox extension

I've been into Firefox extension development recently, and ran into some issues: So, in browser.xul i defined these lines: