In these days of retail therapy, I was amused by these quotes from Our Manners and Social Customs (1891).
"It is held to be unladylike to enter a store unless you have a real errand. To go in 'just to be going' is rude and unnecessarily annoying to the proprietor and clerks."
"It is a good idea to know what you want before you go into a store. To stand at the counter hesitating, or to be unable to tell the clerk what you came in for, is a doubtful compliment to yourself. If you cannot come to a decision, retire from the store until your mind is made up. The time of the clerks is valuable."
"Whisperings in a store are in very doubtful taste."
So, looks like browsing is out then?