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Questions tagged [firefox-developer-tools]

For questions relating to the built-in developer tools in Firefox (Web Console, Debugger, Inspector, Style Editor, and other features similar to Firebug).

For questions relating to the built-in developer tools in Firefox (Web Console, Debugger, Inspector, Style Editor and other features similar to Firebug).

See also: https://developer.mozilla.org/en-US/docs/Tools

692 questions
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How to change Mozilla Developer Tools theme

I recently updated to Firefox 49 and I don't like the new color scheme (green and grey) introduced for the DevTools. Can anybody tell me how to switch to the old DevTools theme (dark , orange , blue)?
Anil Soni
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How to filter multiple domains in Firefox DevTools' Network panel?

I am debugging an API request in Firefox and I am looking to filter multiple domains in the developer tools' Network panel. I can filter by one domain with the domain:domainname.com, but how do I add additional domains?
the_big_blackbox
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What unique features do the Firefox DevTools have that the Chrome DevTools don't have and vice versa?

Now that Firebug is fading away, Firefox users are asked to switch over to the Firefox Developer Tools. Therefore I am wondering, which features do the Firefox DevTools have that are not offered by the Chrome DevTools? Can you please give me an…
Sebastian Zartner
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How to force hard reload on Firefox for Android

How is it possible to force a hard reload on Firefox for Android? On desktop it works with Ctrl + F5, but how does it work in the app?
OttherCreek
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3 answers

How do I see what JS is changing style to my elements in Chrome dev tools or Firefox dev tools?

My is a noob question as I am just learning JS so I am not good at it yet. I am currently building a website ad added some JS snippets to do few actions. Now my footer has opacity: 0 and it doesn't come from CSS, therefore must come from some JS,…
Andrea
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Web developer tools on Android

I'm trying to find a way to use the developer tools in one of the Android browsers, e.g. Chrome and Firefox. They appear to not be shipped with the builds, to avoid cluttering them with functionality used by less than 1% of users I guess. My…
laem
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4 answers

What are the alternatives to the Firefox Developer Tools?

Since last few updates of Firefox our beloved Firebug is integrated into the Firefox Developer Tools and a lot of people including me don't like what happened to Firebug. The built-in developer tools have a very ugly menu system and messed up…
sakhunzai
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Is there any way to simulate onmouseover in Developer Tools?

I know that Firefox has a way to simulate hover, active and focus filters. Is there any way to simulate onmouseover elevation? I want to simulate this in two elements together, is this possible? I didn't find any extension for this purpose. Thank…
Jose Serodio
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10
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4 answers

Any way to remove picture in picture in firefox using javascript or css?

I want to disable Picture in Picture feature for
Rohit Patel
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10
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1 answer

Firefox dev tools: change JS execution context

Chrome dev tools allow to change javascript execution context. It's very handy and I use it a lot in the debugging process. But I need to test my project in Firefox and I can't find UI to change the execution context. Does the Firefox has this…
Eugene Karataev
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2 answers

Why copy function is not working inside setTimeout?

Chrome complains when I try to copy inside setTimeout. setTimeout(function () { copy('a') }, 0) Uncaught ReferenceError: copy is not defined at :1:26 It doesn't work with the window scope as well. setTimeout(function () {…
Sanghyun Lee
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how to debug cookie rejection by the browser

Using either Chrome (Version 59.0.3071.115 (Official Build) (64-bit)) or Firefox (developer edition 56.0b3 (64-bit)), I am unable to understand why I do not see the cookie sent in the response header, get stored in the browser local storage. My HTTP…
Sohrab Saran
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9 answers

Firebug is not working with Firefox version 50.0

I am using Firefox 50.0. After auto update of Firefox to version 50.0, Firebug has stopped working and attempting to use it is showing an inbuilt Firefox console while inspecting any DOM element. Is there any patch to use Firebug on Firefox 50.0…
Arun Jain
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Fail to consume a Spring MVC method from FF RESTClient

When I'm trying to consume a Spring MVC method using FF RESTClient, I get the following error: The server refused this request because the request entity is in a format not supported by the requested resource for the requested method. This is…
Alon
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Can javascript in the dev tools console download/save files, or is this sandboxed?

I'm attempting to write a bookmarklet-like js snippet that can be run from the developer tools console that will provide the src for images in the page: var x = ["PA633", "PA10", "PA11"]; function nextPage(i) { $('#viewport…
John O
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