Firebug (software)

FirebugFirebug (Firefox extension)Firebug (web development)Firebug/ChromebugHTML editor
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.wikipedia
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Firefox

Mozilla FirefoxFirefox browserSpread Firefox
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.
Additionally, Firefox provides an environment for web developers in which they can use built-in tools, such as the Error Console or the DOM Inspector, or extensions, such as Firebug and more recently there has been an integration feature with Pocket.

Joe Hewitt (programmer)

Joe Hewitt
Firebug was licensed under the BSD license and was initially written in January 2006 by Joe Hewitt, one of the original Firefox creators.
Joe Hewitt is a software programmer who is best known for his work on the Firefox web browser and related software development tools like Firebug and DOM Inspector.

JavaScript

Server-side JavaScriptclient-side JavaScriptJS
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.
Old versions of Firefox without these tools used a Firefox addon called Firebug, or the older Venkman debugger.

Google Chrome

ChromeChrome browserGoogle Chrome Extensions
It had two major implementations: an extension for Mozilla Firefox and a bookmarklet implementation called Firebug Lite which can be used with Google Chrome.
For web developers, Chrome features an element inspector (Inspect Element), similar to the Firebug browser extension, which allows users to look into the DOM and see what makes up the webpage.

Opera Dragonfly

Dragonfly
Opera Dragonfly is a web development tool that was integrated into the Opera web browser from Opera versions 9.5 through 12.18, similar to Firebug and development tools built into Mozilla Firefox and Google Chrome.

Internet Explorer Developer Tools

developer toolsInternet Explorer Developer ToolbarF12 Developer Tools

Free and open-source software

free and open-sourcefree and open source softwareFOSS
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.

Web browser

browserweb browsersinternet browser
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.

Debugging

debugdebuggedanti-debugging
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript. FlashFirebug is a paid Firebug extension that helps Flash and Flex developers debug Adobe SWF files on the web.

Cascading Style Sheets

CSSCSS3Cascading Style Sheet
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.

HTML

Hypertext Markup LanguageHTML 3.2HTML 4
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.

Document Object Model

DOMDocument Object Model (DOM)DOM tree
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.

XMLHttpRequest

XHRXMLHTTPXHR2
Firebug is a discontinued free and open-source web browser extension for Mozilla Firefox that facilitated the live debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript.

BSD licenses

BSD licenseBSDNew BSD License
Firebug was licensed under the BSD license and was initially written in January 2006 by Joe Hewitt, one of the original Firefox creators.

Bookmarklet

bookmarklets void()
It had two major implementations: an extension for Mozilla Firefox and a bookmarklet implementation called Firebug Lite which can be used with Google Chrome.

Web testing

testingWeb UI testingapplication testing
In addition to debugging web pages, Firebug was used for web security testing and web page performance analysis.

Syntax highlighting

syntax highlightColour highlightinghighlighting
Firebug 2.0 introduced many new features to the Firebug extension including JavaScript syntax highlighting, pretty print for minified JavaScript code, and a DOM Event Inspector to handle all event handlers on a web page.

Autocomplete

code completionautocompletionword prediction
All editors in Firebug support autocomplete.

Adobe Flash

FlashMacromedia FlashFlash-based
FlashFirebug is a paid Firebug extension that helps Flash and Flex developers debug Adobe SWF files on the web.

Apache Flex

Adobe FlexFlexApache Royale
FlashFirebug is a paid Firebug extension that helps Flash and Flex developers debug Adobe SWF files on the web.

SWF

.swfFlashFlash files
FlashFirebug is a paid Firebug extension that helps Flash and Flex developers debug Adobe SWF files on the web. Flashbug had extensive capabilities to parse AMF and Shared Objects objects and partially decompile Adobe SWF files directly in the browser.

World Wide Web

WebWWWthe web
FlashFirebug is a paid Firebug extension that helps Flash and Flex developers debug Adobe SWF files on the web.

GNU General Public License

GPLGNU GPLGPLv2
FlashFirebug was developed by O-Minds and is licensed under the GPLv3.

Action Message Format

AMFActionScript Message FormatAMF-RPC
Flashbug had extensive capabilities to parse AMF and Shared Objects objects and partially decompile Adobe SWF files directly in the browser.