Keyboard shortcuts for downloading images
Short answer
Alt+A scans all open tabs, Alt+C the current tab, Alt+R every tab to the right and Alt+L every tab to the left. Each one opens the image list straight away, and all four can be reassigned at chrome://extensions/shortcuts.
Doing it by hand
Chrome itself has no shortcut for saving an image. The closest thing is Ctrl+S, which saves the entire page — HTML, scripts and a folder of assets you then have to dig through.
Where that falls apart
- Saving the whole page gives you a folder of everything the page loaded, in whatever names the browser invented.
- There is no shortcut that means "this image" or "these tabs".
- Reaching for the mouse for every gallery adds up fast when you do this all day.
Doing it with ImgDown
Step 1
Learn the four ranges
The shortcuts map to the same ranges as the popup: all tabs, current tab, tabs to the right, tabs to the left.
Step 2
Use left and right to slice a window
Open your sources after the tabs you already had, then press Alt+R — everything to the right gets scanned and the unrelated tabs are ignored.
Step 3
Rebind anything that clashes
Open chrome://extensions/shortcuts to change a combination another extension already claimed, or to add one for the right-click save.
Related questions
Try it on the page you have open
Free, no account, and it works on the next gallery you open.