Link your sources from Ancestry to FamilySearch
This is a quick way to attach an Ancestry.com source to multiple people on FamilySearch.org. The extension will take information from the Ancestry source in the current tab and autofill some fields. Other fields will remember the last value entered. This has helped my wife to quickly source records from Ancestry.com to FamilySearch.org persons.
This only works for images currently. Updated to correctly attach sources after FamilySearch changes.
Ancestry.com and FamilySearch.org accounts are required.