Firefox uses profiles to manage personal data like logins. In order to create profiles besides the default one you can use the Profile Manager by opening "about:profiles" in the address bar. If you often find yourself switching between different profiles you might find the plugin Firefox Multi-Account Containers useful. It allows to color code tabs belonging to a profile to help telling them apart.
Chromium and Google Chrome also allow to use multiple profile in the same browser instance. A straightforward way to make use of that is the plugin SessionBox.
Comments
Thanks! I usually just used a different browser, as well as some anonymous tabs if needed, so its nice to see that there is a more elegant solution to this.
Another idea can be to use some kind of load testing tool, but your solution seems really good, I will try it next time, thank you!
Thanks, this is a very useful information not only for web development
Thank you for sharing this information. In the past, I often used different incognito windows for such problems. This is easy and you don't need to set anything up, if you just have a small test
Thanks for this, I used to use private browsing in such cases but I will definitely try this the next time I had a similar test process.