- Resizes the active browser window to the predefined list of sizes. - Requires no special permissions. - Use the default keyboard shortcut Ctrl+Shift+A (Command+Shift+A for Mac) to resize to the next window size in your list. Keep using the shortcut to rotate window sizes. - You can add and remove sizes in the window sizes list. Go to extension options to do that. - You can change the shortcut. Use "Keyboard shortcuts" in the Chrome extension settings to do that. UPDATES - Menu added. - You can add the current window size using the "Add Current Window Size" button in the options page.