Element as displayed by a tab in Firefox
The simplest way to obtain the Element client is to click the small monkeys closeup image at the top of this page.
The Element client will be downloaded into your browser. (Firefox calls such downloads "extensions".) This download will take a long time (10 minutes or more), but you only need to do wo time (unless you have configured your browser to delete such data when you close the browser). Eventually the download will complete, and Element will prompt you to enter your credentials with a display like: