Greg Winiarski

BlackBox is symfony like unobstrusive debug bar attached to the top of the browser window.
How can it help you with development: 
1. instantly inspect global variables (GET, POST, COOKIE, SERVER) 
2. debug both frontend and admin area 
3. executed MySQL queries and time it took to execute each query (useful for finding slow queries) 
4. profiler for measuring performance of your plugins and themes 
5. errors occurred when loading WordPress page

BlackBox Debug Bar

Immediate feedback on a great majority of errors. Added a conditional red background to the Errors, and with this modification I have never miss even a notice anymore.

Thank you very much!

Essential plugin in my developer toolset

BlackBox is a plugin for plugin and theme developers. It collects and displays useful debug information (errors, executed queries, globals, profiler).

Federico Andrioli

Log/Debug the PHP code in your Theme/Plugin with your Browser Console (no extension needed). Made for themes and plugins developers.
HOW TO CHECK IF BUGFU IS WORKING
Open your Browser Console, if you see this header, BugFu is working properly
<pre><code>################################
#### BugFu Console Debugger ####
################################
</code></pre>
HOW TO OPEN YOUR BROWSER JAVASCRIPT CONSOLE
If you’ve never used the Browser JavaScript Console before, here’s how you open it:
<ul>
<li>Chrome PC shift+ctrl+j – Chrome Mac alt+cmd+j</li>
<li>Firefox PC shift+ctrl+k – Firefox Mac alt+cmd+k</li>
<li>Safari PC shift+ctrl+c – Safari Mac alt+cmd+c</li>
</ul>
HOW TO USE BUGFU WITH WORDPRESS
Call the log static method from wherever you are within the WordPress PHP code
<pre><code><?php /* WORDPRESS CODE HERE */

/* Call it with no arguments to only output some backtrace info */
BugFu::log();

/* Call it with a string argument to output that string content */
BugFu::log($my_string_content);

/* Call it with a non-string argument to output the structured
 representation of that argument - it uses var_export() */
BugFu::log($my_object-array-variable);

/* Call it with the second optional argument set to "false"
 to turn off the backtrace info (which is on by default) */
BugFu::log($my_content, false);
</code></pre>
DEVELOPERS
Official Github repository: 
https://github.com/fedeandri/bugfu-console-debugger

BugFu Console Debugger

Good plugin

Really great plugin. I'm surprised it does not seem to be well known under developers.

Must have for developers

Very useful !

This is a nice plugin to use in concert with the Chrome dev console. It is easy to use and works well.  Thank you for making it available. 

Easy to use and works well

Log/Debug the PHP code in your Theme/Plugin with your Browser Console (no extension needed)

BlackBox Debug Bar vs BugFu Console Debugger