Firefox offers the most complete set of features among the browsers, while the outdated Internet Explorer 11 offers the least. Full details of the browser's features may be found on the attached spreadsheet.
- Some features are available through browser extensions, like master password for Edge. Some features are known by different terminology. While bookmarks is common for Firefox and Safari, Edge designates favorites.
- For Opera, both 60 and 67, battling crypto mining scripts is designated as anti-crypto mining or "cryptojacking".
- Release notes for Safari do not include all features, rather they key on important changes as determined by Apple. Therefore, some older sources, primarily from Apple, were used to prove the existence of more common features like spellcheck.
Most of the available features are listed on the web page of the current version for each browser. Some other specific notes include: For the occasions a feature was deemed not available for the browser, alternative sources were included, such as blogs and forums, in an attempt to provide as much relative information for the negative finding. No sync with mobile feature was found for Firefox 70. Basic and advanced searches did not return any valid source discussing the feature. Many features in Chrome are not specific to the update. These features, like reader mode, were introduced in earlier versions and have remained active. Most of the features for Edge are not particular to only one version, Edge 80 or Edge81. While it is clear the newest version of Edge Chromium blocks crypto mining scripts, it is unclear if Edge 80 does.