Firefox custom resolution preview?
 

I do plenty of web design work on my 1680x1050 monitor, and sometimes I want to see how things would look on, say, 1024x768. That resolution doesn't fit on my widescreen, however, so I'm looking for some plugin that can simulate various resolutions -- maybe bars on each side of the page, or window resizing.

I can also do it via CSS but it's a pain :(

If you unlock some of the features in Firefox, and allow scripts to move or resize existing windows. You can force a resize to various resolutions..
you would then create a bookmark, and paste the following as the "Location" of the bookmark
That bookmarklet would resize Firefox to 1024x768, and then move the window to the top left side of the screen. you can modify those #'s to be whatever resolution. To make it work you would just click on the bookmark. If clicking doesn't work you want to enable the feature at: Tools:Options:Content:Check enable Javascript: Click the "Advanced" button next to it, and allow existing windows to be resized.

Good luck.

https://addons.mozilla.org/en-US/firefox/addon/60

try this firefox extension... besides resizing the browser you have a bunch of other useful tools for webdesign.

gl

Thank you, that was exactly what I was looking for.