To resize the Firefox browser window to 1024 x 768 create a resizing bookmarklet.
Creating a Resizing Bookmarklet
Right click on Bookmark Toolbar -> New Bookmark to launch the Bookmark dialog box.
Insert the following into the box:
- Name: Give a descriptive name if you are planning to add several bookmarklet.
Both Keywords and Description can be left blank.
Test your bookmarklet, click and it should resize to it’s specific size.