Chrome, Safari and Firefox each have a responsive design mode that lays out a page at any width. Here is how each one opens and what it offers, and what you can actually use when the only screen you have is a phone.
Chrome and Edge profiles, Firefox Multi-Account Containers, Safari Profiles and per-project storage compared: what each keeps separate, which platforms support it, and why none of them give you a disposable identity on a phone.
Every major mobile browser can request a site's desktop version. Here is where the option lives in Safari, Chrome, Firefox, Edge and Samsung Internet, how to make it stick, and what it doesn't do.
How to create a Safari profile on iPhone, switch between profiles, pick extensions per profile and switch automatically with Focus. Also covers what a profile keeps separate and where profiles fall short.
Mobile browsers have no hard refresh. Here is the least destructive way to get a fresh copy of a page in Safari, Chrome, Firefox, Edge and Samsung Internet on iPhone, iPad and Android, and what each option costs you.
A hard refresh is a keyboard shortcut on every desktop browser and a missing feature on every mobile one. Here is exactly what each browser supports, on which platform, and what the mobile workarounds actually cost you.