I welcome this extension as I, too, hate when sites prevent me from pasting (eg. to confirm my account and routing number, email address, etc). It fucks with my password manager and of course it's annoying when intricate password rules are implemented to counter the use of weak passwords. BUT. Yeah there's always a but.

But. I have implemented these exact security measures into web applications. I've been handed the requirements and I implemented them. I asked my client why we had to do this, when "everyone" knows that this stuff is terrible user-experience and can backfire spectacularly for security (the same people who would memorize a shitty password and use it everywhere, will now write their expiring, "strong", impossible-to-remember password on a sticky note or save it to a text file or spreadsheet called 'passwords.txt' on their Desktop). The answer is: we have to, for compliance. To pass a security audit. To prove to some major client or insurance company that we have a number of industry-standard measures in place to improve security. Unfortunately, your bank does not care about the 2% of us using password managers. Everyone else is still memorizing passwords, forgetting them, and making jokes about it like it's 2003.