Is this a Firefox password manager or a general password manager with integration with Firefox? Should I expect to be able to replace 1Password with it for inst

Is this a Firefox password manager or a general password manager with integration with Firefox? Should I expect to be able to replace 1Password with it for instance. If I can't then I have no motivation to have two password managers. Unrelated, does this page implement it's own custom scrolling? I get some weird rendering bugs when scrolling too, very stuttery.