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To answer the actual question, one way to detect if users are using Lastpass is to provide some type of login field and use jQuery or similar to see if Lastpass has inserted the "background-image" it inserts into the login fields it can autofill. Here's an example of an email input field, all the stuff in the style tag has been added by Lastpass: <input ...


You can use Javascript to detect the typing speed in the username/password fields. A variable rate suggests someone is typing it in manually while a constant rate or even no keystrokes at all (copy-paste) means someone is using a password manager.


Is there any way of identifying whether or not my visitors are using one of these plugins and how best to support it? By far the best way to support password managers is to use normal <form> tags and a normal form. If you don't do anything clever, then the password manager will do its job.


Is there any way of identifying whether or not my visitors are using one of these plugin? Yes. Users can install LastPass as a browser plugin. Thus you can rely on client side scripting languages to check if LastPass is installed. For instance, using NavigatorPlugins.plugins allows you to get the a PluginArray object, listing the plugins installed ...


Most of these password managers are browser plugin based and work by populating the form fields and triggering a form submission as if the ueer pressed the submit button, to the server it appears as a normal form submission, no way to tell if it coming from a password manager.


From a Google point of view, you want your content above the fold (before users need to scroll): As we’ve mentioned previously, we’ve heard complaints from users that if they click on a result and it’s difficult to find the actual content, they aren’t happy with the experience. Rather than scrolling down the page past a slew of ads, users want to see ...

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