Time Traveler for firebug The first known use of firebug was in See more words from the same year. Statistics for firebug Look-up Popularity. Style: MLA. English Language Learners Definition of firebug. Get Word of the Day daily email! Test Your Vocabulary. Can you spell these 10 commonly misspelled words? Love words? Generally your parent theme will contain one style. This occurs when new CSS has been added to overwrite the old code and is loaded after the original code or loaded last.
This screen shot shows the default link color has been changed and therefore shows a line through it. Here you can edit your site in real time and view the changes in nyour browser without actually changing the style. Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. This is pretty handy if you find that the requests are failing for no reason you can discern. To make the most of this, it's important to make sure that the data being sent by the server is properly encoded and has the right headers.
This will make firebug show you the response in a lot more detail than if you just echoed the data as XML fragments. In Firebug you can break on DOM mutations, that means that when an element is changed, the script execution is stopped at the related line within the JavaScript file, which caused the change.
This feature can globally be enabled via the Break On Mutate button, or individually for each element and for different types of changes like attribute changes, content changes or element removal. Unfortunately, the DevTools do not have this feature yet see bug To stop the script execution there, you need to set a breakpoint on the line with the modification within the Debugger panel.
It even displays a list with matching IDs or classes. Searching by XPaths is not supported though see bug Both allow you to debug JavaScript code executed on a website.
Those sources can be static, i. In the DevTools' Debugger panel the scripts are listed at the left side within the Sources side panel.
In Firebug you can set different types of breakpoints, which are all listed within the Breakpoints side panel. In the DevTools the breakpoints are shown below each script source within the Sources side panel. Those panels allow you to enable and disable single or all breakpoints and to remove single breakpoints or all of them at once. They do currently only allow to set script breakpoints.
While there are no breakpoints for single JavaScript errors, there is a setting Pause on Exceptions within the Debugger panel options.
They work the same in both tools. When the script execution is paused, Firebug displays the function call stack within its Stack side panel. In there the functions are listed together with their call parameters. In the DevTools the function call stack is shown within the Call Stack side panel.
To see the call parameters in the DevTools, you need to have a look at the Variables side panel. The Watch side panel in Firebug displays the window object the global scope by default. With the script execution halted it shows the different variable scopes available within the current call stack frame.
Furthermore, it allows you to add and manipulate watch expressions. The DevTools have a Variables side panel , which works basically the same. The main difference is that it is empty when the script execution is not stopped, i.
In addition to that it allows to create new style sheets and to import existing style sheets and apply them to the page. It also allows you to toggle individual style sheets. The Style Editor has a sidebar for this purpose. Firebug's CSS panel offers three different ways for editing style sheets. The default one is to edit them inline like within the Style side panel.
Furthermore it has a Source and a Live Edit mode , which allow to edit the selected style sheet like within a text editor. Firebug's Selectors side panel provides a way to validate a CSS selector.
It lists all elements matching the entered selector. The DevTools don't have this feature yet, but it's requested in bug Firebug allows to search within the style sheets via the search field. The Style Editor in the DevTools also provides a way to search within a style sheet, though there is currently no option to search within multiple sheets see bug and also not via a regular expression see bug Firebug allows to profile JavaScript performance via the "Profile" button within the Console panel or the console.
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