You will be able to tell that you are in private mode thanks to the mask located in the upper right corner of the window.
You can also just use the keyboard shortcut CTRL + SHIFT + P. To enable private browsing in Firefox, click on the hamburger icon in the upper right corner and select New Private Window. Firefox will prevent this when you are in private mode. Have you ever visited a travel website to explore a vacation and then suddenly saw an advertisement for the same place while browsing other websites? That is, you are tracked as you browse the pages. This will block parts of sites that try to track your browsing history across multiple sites. Firefox not only does not record the history of the websites you visit, it also provides tracking protection.
Please note that Private Browsing works slightly differently in Firefox than in other browsers. I’ve already written about how to enable private browsing in IE 11 and Microsoft Edge, and in this article, we’ll talk about Firefox. All web browsers now have a privacy feature called private browsing that allows you to browse websites without tracking your history locally on your computer.