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 8
First removed from Safari 2

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

10 APIs took an average of 3255.35 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).
DOM API APIsDOM API TTACSS APIsCSS TTAHTML APIsHTML TTA
2011 15647.350NaN15647.35
2016 13638.350NaN0NaN
2017 23388.850NaN0NaN
2019 0NaN0NaN12665.35
2020 0NaN12231.350NaN
2021 11959.3521993.350NaN

Deprecated APIs

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

Raw Data

Quick Links:

DOM API Data

API First Browser Date Last Browser Date Days Notes
api.File.lastModifiedDate Safari9/20/2016 Firefox6/26/2018
api.HTMLHeadElement.profile 📋Firefox3/22/2011 Safari3/27/2023
api.RTCPeerConnection.removeStream Firefox1/24/2017 Safari9/17/2018
api.SpeechSynthesisEvent.elapsedTime.milliseconds Safari4/26/2021 Firefox12/7/2021
Firefox: Windows and macOS only.
api.Window.showModalDialog Firefox9/28/2017 Safari3/27/2023

CSS Data

API First Browser Date Last Browser Date Days Notes
css.at-rules.media.prefers-color-scheme.no-preference Firefox7/28/2020 Safari9/20/2021
css.properties.caption-side.left Firefox3/23/2021 Safari9/18/2023
css.properties.caption-side.right Firefox3/23/2021 Safari9/18/2023

HTML Data

API First Browser Date Last Browser Date Days Notes
html.elements.audio.autoplay 📋Firefox5/21/2019 Safari9/18/2023
html.elements.head.profile 📋Firefox3/22/2011 Safari3/27/2023