There are quite hundreds of Chrome extensions available for web designers/developer, all of them offering time-saving solutions to many of the design and development issues that will often crop up.
Following list of Chrome Extensions for Web Designers
A tool for designers to measure screen dimensions.
Generate random corporate double-speak for use as filler text.
Resize browser window to emulate various screen resolutions.
The EnjoyCSS extension allows you to access all of the handy CSS3 tools from the EnjoyCSS website all within the comfort of an extension.
Gradient Inspector is a new extension from Rafael Carício that adds a sidebar to Chrome’s Developer Tools that will show information about the gradients that are applied to the inspected element.
Fontface Ninja is an interesting extension that not only allows you to discover what fonts are actually being used on a website, but also allows you to download them as well.