The Right-Click Walk Score Chrome extension allows you to get the Walk Score of any address just by selecting it, right-clicking (or ctrl-clicking), and choosing “Get Walk Score for this address” from the context menu. It works not only on addresses but also on city names, neighborhood names, and zip codes.
By default, the extension pops up a small summary window displaying just the walk, transit, and bike score badges. You can click through to the full detailed view from there.
You may configure the extension to skip the summary popup window and load the full Walk Score page directly into a new window or tab instead.
If you will be searching in only one city, you may also configure the extension to always qualify searches with that city name. This expands the functionality of the extension so it can cope more impressively with incomplete addresses and unqualified neighborhood names.
For more details see the README file on the GitHub repo: