I'm using my normal web browser to edit Wikipedia articles, and it wasn't really designed to be an editor. Several times I have lost my work because either the browser crashed or the website wasn't responding when I was done and wanted to save my article. Real text editors or word processors have an auto-save function that allows me to recover and continue work after a crash, so why shouldn't a web browser? Of course I could write my article in a real text editor, and submit it using cut-n-paste to the browser, but I'm too lazy to switch back and forth.
If you know a web browser that supports offline writing or has an auto-save function, please enlighten me. Do you use Emacs Wiki?
If you're using the free software Mozilla 1.x browser, you might be interested in this new bug report/feature request by me, http://bugzilla.mozilla.org/show_bug.cgi?id=158258