While making an online purchase today, Safari insisted on filling in my "work" details in the purchase form, a recurring problem that has been aggravating me for a long time now, so I finally decided to look into it. I turned up this app, gave it a whirl, and BAM! Problem solved. Safari now autofills using my home details. PERFECT! FYI to anyone obsessed with the age of the app.... although the app hasn't seen an update since 2011, I'm running Safari 8.0.7 on Yosemite 10.10.4 and it still works fine.