Editing Browser engine (section)

==Notable engines==
{{Further|Comparison of browser engines}}

* [[Apple Inc.|Apple]] created the [[WebKit]] engine for its [[Safari (web browser)|Safari]] browser by [[Fork (software development)|forking]] the [[KHTML]] engine of the [[KDE]] project.<ref>{{cite web|url=http://news.cnet.com/2100-1023-980492.html |archive-url=https://web.archive.org/web/20121025015655/http://news.cnet.com/2100-1023-980492.html |title=Apple snub stings Mozilla |author=Paul Festa |publisher=[[CNET Networks]] |date=14 January 2003 |archive-date=25 October 2012 |access-date=16 February 2017 |author-link=Paul Festa |url-status=dead }}</ref> Apple mandates that all browsers on [[iOS]] must use WebKit as their engine.<ref>{{cite web |title=Open-sourcing Chrome on iOS! |year=2017 |url= https://blog.chromium.org/2017/01/open-sourcing-chrome-on-ios.html |quote=Due to constraints of the iOS platform, all browsers must be built on top of the WebKit rendering engine. |access-date=26 April 2021}}</ref> (In 2024, the mandate was removed for the [[European Union]], but it is still enforced elsewhere.<ref>{{cite web|url=https://www.macrumors.com/2024/10/24/ios-18-2-eu-third-party-browser-web-apps/ |title=iOS 18.2 to Allow Third-Party Browser Web Apps With Custom Engines in EU |date=24 October 2024 |work=MacRumors |author=Tim Hardwick}}</ref>)
* [[Google]] originally used WebKit for its [[Google Chrome|Chrome]] browser but eventually forked it to create the [[Blink (browser engine)|Blink]] engine.<ref>{{cite web |first=Peter |last=Bright |title=Google going its way, forking WebKit rendering engine |url=https://arstechnica.com/information-technology/2013/04/google-going-its-own-way-forking-webkit-rendering-engine/ |website=[[Ars Technica]] |publisher=[[Conde Nast]] |date=3 April 2013 |access-date=9 March 2017}}</ref> All [[Chromium (web browser)|Chromium]]-based browsers use Blink, as do [[application software|applications]] built with [[Chromium Embedded Framework|CEF]], [[Electron (software framework)|Electron]], or any other<!--incl. Qt WebEngine which doesn't need to be mentioned here--> [[software framework|framework]] that embeds Chromium.
* [[Microsoft]] has two [[proprietary software|proprietary]] engines, [[Trident (software)|Trident]] and [[EdgeHTML]]. Trident, also called MSHTML, is used in the [[Internet Explorer]] browser. EdgeHTML, being a fork of Trident, was the original engine of the Edge browser (now called [[Edge Legacy]]); it's still found in some [[Universal Windows Platform apps|UWP apps]].<ref>{{cite web |last=Mendelevich |first=Alan |date=14 May 2021 |title=You Think You Can Forget About the "Legacy" Microsoft Edge? Not So Fast! |url=https://blog.ailon.org/you-think-you-can-forget-about-the-legacy-microsoft-edge-not-so-fast-28ce91270a22}}</ref> The new, [[Microsoft Edge|Chromium-based Edge]] was remade with the Blink engine.<ref>{{cite web |last1=Mackie |first1=Kurt |title=Microsoft Edge Browser To Get New Rendering Engine but EdgeHTML Continues |url=https://redmondmag.com/articles/2018/12/10/edgehtml-continues.aspx |website=Redmond Mag |date=10 December 2018 |access-date=21 December 2019}}</ref>
* [[Mozilla]] develops the [[Gecko (software)|Gecko]] engine for its [[Firefox]] browser and the [[Mozilla Thunderbird|Thunderbird]] email client.<ref name="Gecko"/>

===Development timelines===
<small>This figure shows for various browser engines the duration of its active [[software development|development]], the period when relevant new [[web standards]] continue to be added to it.</small>

<timeline>
# header
ImageSize = width:750 height:170
PlotArea  = left:80 right:5 bottom:20 top:5
AlignBars = justify
DateFormat = dd/mm/yyyy
Period     = from:01/01/1997  till:31/05/2022
TimeAxis   = orientation:horizontal   format:yyyy

Colors =
  id:microsoft     value:rgb(0.3, 0.5, 1)
  id:gecko       value:rgb(1, 0, 0)
  id:khtml       value:rgb(0.3,0.3,0.3)
  id:webkit      value:rgb(0.3, 0.36, 0.36)
  id:blink       value:rgb(0.3, 0.39, 0.39)
  id:mgray       value:rgb(0.5, 0.5, 0.5)
  id:lgray       value:rgb(0.75, 0.75, 0.75)

ScaleMajor = gridcolor:mgray unit:year  increment:1   start:01/01/1997
ScaleMinor = unit:month increment:3   start:01/01/1997
BackgroundColors = bars:lgray

BarData =
  bar:Gecko           text:Gecko
  bar:Trident          text:Trident
  bar:EdgeHTML        text:EdgeHTML
  bar:KHTML           text:KHTML
  bar:WebKit          text:WebKit
  bar:Blink           text:Blink

PlotData=
  align:center textcolor:black fontsize:8 mark:(line,black) width:15 shift:(0,-4)

  bar:Gecko
  from: 01/05/1997  till: 31/05/2022    color:gecko mark:(line,white)

  bar:Trident
  from: 01/10/1997  till: 15/07/2015    color:microsoft mark:(line,white)

  bar:EdgeHTML
  from: 12/11/2014  till: 15/12/2018    color:microsoft mark:(line,white)

  bar:KHTML
  from: 04/11/1998  till: 15/10/2016    color:khtml mark:(line,white)

  bar:WebKit
  from: 25/06/2001  till: 31/05/2022    color:webkit mark:(line,white)

  bar:Blink
  from: 03/04/2013  till: 31/05/2022    color:blink mark:(line,white)

</timeline>