Freezetab saves a tab's url, title, favicon, and the date and time the tab was saved. When you reopen a tab, the extension opens a new tab and navigates to the saved url. The extension does not actually create bookmarks, nor does it save the content of a website. All of your data is stored via chrome's local storage api.
I used the words bookmark and tab on the landing page, because they are familiar words that provide a reference point for people trying to quickly grasp what the extension does (especially non-technical people). There's always a tradeoff between precision and concision when crafting marketing materials, but I hope most people are able to understand the project's basic functionality.