Some websites use the same login for multiple domains (i.e. steampowered.com and steamcommunity.com), however it is not possible to have a single entry for both domains or link those entries so they stay synchronized when you change your password.
I would like to report the opposite idea: where I work I need access with different credentials to the same domain, but in different paths. For example: mywork.com/path_a and mywork.com/path_b So I would like the credentials to be associated not only with the domain but also with the page path. Also I would like the credentials to be associated with a title, so that if I need to use multiple credentials in the same place with the same username but different password I can do so.
Many accounts for major sites/workspaces now span multiple subdomains of the same site, or even different domains, as well as many SSO and authentication flows becoming more popular, which all adds up to many potential login URLs that would relate to the same username & password.
Having to maintain login info for the same account in multiple entries in password manager is labor intensive and introduces risk (forgot to update manually in all locations).
The Firefox Password Manager needs a mechanism to link the same account to multiple sites.
One way to help with this would be to setup 'Equivalent Domains': ideally a global list (to simplify known subdomains using the same account credentials for basic users) which can be modified by advanced users to add known equivalents (see Manage Equivalent Domains in Account Settings from LastPass Guide).
Another idea would just be to allow adding secondary URLs to an existing password entry, with the same logic to resolve/simplify the URL to subdomain level, as used for the initial entry.
Re: Enable 'Equivalent Domains' for Password Managerrelated topic, but I believe it is a different request. Passwords save for subdomains appears to be asking for different accounts/password entries for subdomains within a site (already supported?), while I am asking for the same account/password entry to apply to multiple subdomains/URLs.
I came here to suggest the same, the ability to link accounts from multiple websites so that when you change the password it changes for all of them.
In my work I have a lot of password entries for different subdomains of the same domain. Some of the subdomains use one account while the rest use a different account. Whenever one of the two passwords expires (and that happens often...) I need to manually check each of the password entries to find which of them use the password I just changed in order to update the stored password.