achellios

WordPress bloggers will sometimes copy headlines from a WordPress-generated homepage and paste them into the post-editing window. In Firefox, this has the unfortunate result of converting absolute urls into relative ones. For example, copying a headline from http://khaotica.com converts the permalink for this article:
http://khaotica.com/2009/12/firefox-relative-links-fix-wordpress.html
…to a relative link:
../2009/12/firefox-relative-links-fix-wordpress.html
This creates broken links when the post is viewed on the archive page and RSS feed. The links will also be broken for subscribers who receive posts via email.
Enter the Relative Links Fix. This plugin will replace relative urls with the proper absolute urls every time you save or publish a post. If you use WordPress and can’t shake those copy-paste habits, this is the plugin for you.
As always, donations are appreciated. I promise to spend them exclusively on soda (the creative fuel that powers developers everywhere).

Relative Links Fix

Corrects Firefox behavior in which pasting formatted content in the editor converts absolute URLs to relative URLs.

Chris Bratlien

Allows you to publish content during dev phase without having to go back and 
fix your content’s static URLs when you switch to the production URL. Registers [url] shortcode 
with your site’s base URL setting. Replaces occurances of http://mysite.com/the/link 
with [url]/the/link inside the content editor when you hit Publish or Update.
http://chrisbratlien.com/2010/05/16/relative-site-url-on-content-save/

Relative Site URL on Content Save

Allows you to publish content during dev phase without having to go back and fix your content's static URLs when you switch to the production URL …

Relative Links Fix vs Relative Site URL on Content Save