Images & HTML Elements
Measure between the following elements: images, input-fields, buttons, videos, gifs, text, icons. You can measure everything you see in the browser.
Your designer handed you mockups as PNGs or JPEGs? Just drop them into Chrome, activate Dimensions and start measuring.
For the best experience set a keyboard shortcut in the chrome setting at the end of the extensions list to quickly enable and disable Dimensions.
Wanna get the radius of a circle? Is text standing in your way? Press Alt to measure the dimensions of a connected area. Try it out!
Dimensions is Open Source and hosted on Github. Want to port it to Firefox? Go ahead and fork it. Pull requests are welcomed!