[StGaensler]

Name: Web Developer Extension

Version: derzeit 1.0.2
OS: Windows und Linux und Mac - oder besser:
Browser: Firefox/Flock und Mozilla/SeaMonkey
Lizenz: OpenSource (GNU General Public Licence)
Link: http://chrispederick.com/work/webdeveloper/

Beschreibung:
Die Extension bindet sich als kleine Symbolleiste in den Browser ein, und über Dropdown-Menüs lassen sich jede Menge Tools für das alltägliche "Web Development" auswählen. Sehr oft verwende ich die Tools zum Hervorheben von Elementen (Tabellen, Tabellenzellen), zum "debuggen" von CSS (zeigt alle Eigenschaften eines Objekts mit Zeilennummer, wo diese zugewiesen werden, an), und die Möglichkeit, gewisse Sachen schnell zu deaktivieren (JavaScript, Bilder, ...)
Die Extension ist mir inzwischen bei meiner täglichen Arbeit unabdingbar geworden. Ich kann sie nur empfehlen.
Ein kleiner Vorteil der Extension ist, dass man für sie einen Mozilla-basierenden Browser braucht

Features:
The Web Developer extension adds a menu and a toolbar to the browser with various web developer tools.
The disable features allow the disabling of various features including the cache, JavaScript and page colors.
The cookies features provide various cookie related tools including disabling, adding and viewing cookies.
The CSS features provide various tools related to the CSS on the page including displaying the styles applied to the selected element and live editing of the CSS.
The forms features provide the ability to manipulate the forms on the page including display the form details and populating form fields.
The images features provide various image related tools including finding broken images and outlining images.
The information features provide various informational tools including displaying element information and viewing the document size.
The miscellaneous features provide various tools including displaying a ruler and live editing of the HTML.
The outline features allow the outlining of various elements including block level and positioned elements.
The resize features provide the ability to resize the window to pre-defined or custom sizes and to display the current window size.
The tools features allow an unlimited number of configurable tools including validating the CSS and the HTML.
There view source features provide the ability to view the page source including viewing the generated source and viewing the source in an external application.

[execute]

jap jap jap, sehr gute extension fuer den feuerfuchs! benutzte sie schon lange, sehr praktisch!

kann sie auch nur empfehlen.

mfg, exe

[Armin]

Und für den Opera unter http://www.diplo.co.uk/design/operatools.php

I've also added my Web Developer Menu to my site, which you can download and install automatically to Opera by clicking the link below. The menu adds lots of new context-sensitive options to Opera for validating your pages, tweaking forms and finding out info about the domain you are viewing. In fact, all the things that budding web developers would find useful! See the example screenshot for an idea of what it can add to your Opera.

[Bart]

Für opera gibt es auch eine Toolbar:

http://operawiki.info/WebDevToolbar

http://my.opera.com/Vital/blog/show.dml/257250