Getting working status of all sites without visiting any of them
#183 (closed) was about getting working status of sites for which the current extension extension is able to show footprints. MR !221 (merged) only helped getting the result of those sites which are already visited at least once and show them as 'working' in 'settings' of the extension by default if not visited at all.
!221 (merged) was a good solution for validators used in MR !204 (merged) by @nakulh , but it would be better if we could have working status of all the sites before actually visiting any of them.