Webmasters Tools- Get all those what we found useful
CSS
Debugging
FireBug — work with DOM, CSS, JS or XHTML in any web page: available for
Firefox.
FireBug Google Group
Documentation
IE Tab — embeds Internet Explorer tabs in
Firefox so that cross-browser checks are a simpler process.
Web Developer — has localized versions at
developer’s website. Chris Pederick has now created versions for different browsers:
Download for
Firefox.
Domain Names
DT WHOIS —
domaintools.com‘s WHOIS-checking button for your webrowser.
DOM
FireBug — work with DOM, CSS, JS or XHTML in any web page: available for
Firefox
FireBug Google Group
Documentation
Web Developer — has localized versions at
developer’s website. Chris Pederick has now created versions for different browsers:
Download for
Firefox.
FTP
Fireuploader:
Upload files/photos/videos to Flickr, Picasa, Youtube,
Box.net(1GB of free space), Facebook, Webshots and OmniDrive in this
version. Next versions would support other websites like Google Videos
etc. You can add multiple files to the queue at a time.
FireFTP: integrated FTP client for Firefox.
Javascript
FireBug — work with DOM, CSS, JS or XHTML in any web page: available for
Firefox.
FireBug Google Group
Documentation
JSView — maximizes “View Source” by showing any embedded .js and/or .css files
PHP
phplangeditor — GUI for translation of language files of your PHP scripts.
SEO
Live Page Rank — displays Google PageRank for the currently visited page.
SEOQuake — Seoquake is aMozilla Firefox extension aimed primarily at helping web masters who deal with search engine optimization and internet promotion of web sites. Seoquake allows to obtain and
investigate many important SEO parameters of the internet project under
study on the fly, save them for future work, compare them with the
results, obtained for other, competitive, projects. Beginner web masters
will find SeoQuake useful for estimating effectiveness and competitive
ability of their SEO efforts. In the hands of professional SeoQuake will
become a powerful and indispensable tool for analyzing optimization and
promotion level of internet web-projects.
Validation
Total Validator — Validates HTML v.2.0 to XHTML v.1.1; accessibility (WCAG, 508); checks for broken links, and more!
developer’s website
Web Developer — has localized versions at developer’s website. Chris Pederick has now created versions for different browsers:
Download for
Firefox
XHTML
FireBug — work with DOM, CSS, JS or XHTML in any web page: available for
Firefox.
FireBug Google Group
Documentation