HTML width/height attributes:
CSS width/height rules:

remove image sizes

Drag the above link onto your personal toolbar/favorites bar/links bar/whatever and click it when you want to remove arbitrarily-set image sizes on web pages. Note that IE may explain that the link "may not be safe." You may safely ignore this warning and choose "Yes." The bookmarklet should work in just about any DOM-compliant browser, such as Mozilla, FireFox, Safari, Opera, or Internet Explorer, but has only been tested in FireFox.

Please send suggestions, bug reports, etc. to ian @ polpo . org.