Simon Willison’s Weblog

Tuesday, 9th June 2020

Tip for changing cookie subdomains: change the cookie name too. This is a really useful tip I hadn’t encountered before. If you make a change to the way cookies are configured—changing the cookie domain or path for example—it’s a good idea to change the name of the cookie as well. If you don’t change the cookie name you’ll see weird behaviour for users who have previously had the cookie set using the older configuration. This definitely explains bugs I’ve seen in the past. Filing this tip away for future cookie-related development work. # 6:41 pm

Apple password-manager-resources (via) Apple maintain on open source repository full of heuristics for implementing smart password managers. It lists password rules for different sites (e.g. min/max length, special characters required), change password URLs for different services and sites that share credential backends—like and They accept pull requests! # 4:21 am

2020 » June