Deprecated

For a given set of browsers, what APIs are removed in all of them how many days it take for the API to removed in the first browser to the last.

Example Comparisons
Browsers
Features

Summary

A count of the number of APIs that were removed from A first and B last.
Last removed from FirefoxLast removed from Safari
First removed from Firefox 1
First removed from Safari 3

Average time for an API to be removed across Firefox and Safari

4 APIs took an average of 2391.08 days to be removed

API breakdown:

Average time to landing by year of first deprecation

If a feature is deprecated in the earliest browser in 20XX it took Y days on average to become deprecated in the last browser (when considering Firefox and Safari). TTA (time to available).
HTTP APIsHTTP TTA
2019 42391.08

Deprecated APIs

Below is a list of features that are deprecated in Firefox and Safari

Raw Data

Quick Links:

HTTP Data

API First Browser Date Last Browser Date Days Notes
http.headers.Clear-Site-Data.executionContexts 📋Firefox7/9/2019 Safari1/27/2025
http.headers.Referrer-Policy.no-referrer-when-downgrade Safari9/19/2019 Firefox9/7/2021
http.headers.Referrer-Policy.origin-when-cross-origin Safari9/19/2019 Firefox9/7/2021
http.headers.Referrer-Policy.unsafe-url Safari9/19/2019 Firefox9/7/2021