Some file formats (e.g. html, png) will be viewable in your browser, and will appear as clickable links below that will open the file once you've fully extracted your archive. Other file types can be opened by their appropriate applications by navigating through the archive's directory. You can click on any folders that may be present to see their contents.
Data that are still in the process of being deleted are not included in your archive.
Learn more about your deleted data.
Below are all the possible formats you could have received in your archive:
Addresses and more
Information entered into online forms, such as phone numbers, email addresses, and some physical addresses.
Bookmarks
The pages bookmarked in Chrome.
History
The sites visited in Chrome, including web addresses entered in the address bar.
Dictionary
Words added to Chrome dictionary.
Extensions
Extensions installed from the Chrome Web Store.
Settings
Chrome user settings.
Reading List
Pages added to the reading list in Chrome.
OS Settings
ChromeOS settings. Not exported in third-party takeout.
Device Information
Information about user devices that are running a sync-enabled Chrome browser. Not exported in third-party takeout.