In the vault, one can select two or more passwords, and do several operations on those. One missing option is to merge them together. I have found that I occasionally get two entries for the same site. This either results in two nearly identical entries (and the security checker complaining that I reused a password) or entries where one has the current information and the others have out-of-date information. Being able to merge these with a tool that highlights differences (including differences in password age) would be very helpful.
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