This page lists Firefox's experimental and partially-implemented features, including evolving or proposed web platform standards. Each entry below includes information about the builds in which a feature is included (Nightly, Beta, Developer Edition, or Release), whether it is activated by default or not, and the name of the preference you can use to activate or configure the feature. The description of each feature also includes links to relevant Bugzilla bugs that implement or enable the feature. This information allows you to try out experimental features and provide feedback before they are officially released.