Post on 13-May-2015
description
transcript
What is a web browser and what it does?
A tool for retrieving information from the Internet
View documents and resources Access information from servers, private
networks, etc.
The beginning
History
The first one – “WorldWideWeb” by Tim Berners-Lee in 1991
One of the first graphical browsers – NCSA Mosaic, in 1993
First browser war between Internet Explorer and Netscape starts in 1995
Opera debut in 1996
History
Apple’s Safari launches in January 2003Firefox 1.0 is released in the late 2004The most significant entrant – Google Chrome,
September 2008
Features
Support for variety of file formats and protocols
Pop-up blockers Bookmarks Web feeds Plugins
Interface
Back and forward buttons Refresh button Stop button Home button Address bar Search bar Status bar
Engine
“Translates” marked up content (HTML, XML, image files, etc.) into formatted content
Handles links, cookies, scripting, plugins-loading
Embedded in e-mail clients, online help systems and other applications as well
A standard part of a browser nowadays
Popular engines
Gecko – the open-source web browser engine used by Firefox
Internet Explorer’s Trident Opera’s Presto engine WebKit – the rendering engine for Safari and
Google Chrome
Web browser security
Main sources of threats – Cookies, Active-X, Java and JavaScript malicious scripts
Encryption of information can ensure safety Getting the latest updates Anti-spyware programs
Microsoft Internet ExplorerMicrosoft Internet Explorer
first appeared: first appeared: August 16, 1995August 16, 1995
market share today: market share today: 50%50%
Today's most widely used browser. It is because users
- find it included with Windows, which is used by 90% of Internet users - are unaware of having a choice - are reluctant of changing their habits - think it makes no difference
ProsPros
Requires no installationRequires no installationBuilt into Windows since 98
Easy to useEasy to useNo difficult settings
Compatible with other Microsoft productsCompatible with other Microsoft productsOffice and so on
Many people use itMany people use itTautological: many people use it becausethere are many people using it
ConsConsSlow to introduce featuresSlow to introduce featuresNetcaptor had tabs in 1997, Internet Explorer 7 called it Netcaptor had tabs in 1997, Internet Explorer 7 called it innovation in 2006innovation in 2006
Hates standardsHates standardsIt's near impossible to write your page so even the newest It's near impossible to write your page so even the newest version of IE renders it correctlyversion of IE renders it correctly
AnnoyingAnnoyingClicking sounds,Clicking sounds,
““Never Show Me This Message Again”Never Show Me This Message Again”messages appearing over andmessages appearing over and
over again, you name itover again, you name it
Near zero extensibilityNear zero extensibilityUnless we call everyUnless we call every
adware toolbar a bonusadware toolbar a bonus
Evolution
Safari
Apple's Safari ranks fourth in the the World's Most Used Browser race. It is Mac OS X's default browser, as well as iOS'. It has been available on Windows PC for four years now.
first appeared: first appeared: January 7, 2003 (Mac OS X), June 11, 2007 January 7, 2003 (Mac OS X), June 11, 2007 (Windows)(Windows)market share today: market share today: 8.72%, 62.17% (mobile)8.72%, 62.17% (mobile)
ProsPros
Interface, Apple StyleInterface, Apple StyleSmooth, polished and simpleSmooth, polished and simple
Reader ModeReader ModeAnd Reading ListsAnd Reading Lists
CustomizableCustomizableAnd AdBlock is amongAnd AdBlock is amongavailable add-onsavailable add-ons
Free Apple productFree Apple productDoesn't cost an arm and a legDoesn't cost an arm and a leg
ConsCons
Not IntuitiveNot IntuitiveShortcut finding = keyboard mashingShortcut finding = keyboard mashing
Missing FeaturesMissing FeaturesCan't find things you take for granted Can't find things you take for granted by nowby now
Extensions lackingExtensions lackingA parsec away from FirefoxA parsec away from Firefox
ChromeChrome
Developed by Google and Developed by Google and currently the third most currently the third most used browser in the world.used browser in the world.
Users love it for itsUsers love it for itssimplicitysimplicity
first appeared:first appeared: September 2, 2008 September 2, 2008market share:market share: 25% 25%
Chrome and ChromiumChrome and Chromium
2008: Google released 2008: Google released a large portion of a large portion of
Chrome's source code, Chrome's source code, allowing programmers allowing programmers to study how it works to study how it works
and port it to other and port it to other OS.OS.
"By submitting, posting or displaying the content you give Google a perpetual, irrevocable, worldwide, royalty-free, and non-exclusive license to reproduce, adapt, modify, translate, publish, publicly perform, publicly display and distribute any content which you submit, post or display on or through, the services. This license is for the sole purpose of enabling Google to display, distribute and promote the services and may be revoked for certain services as defined in the additional terms of those services."
Mozilla FirefoxMozilla Firefox
Free and open source Free and open source browser, running on a whole browser, running on a whole range of operating systems range of operating systems and holding the second place and holding the second place as most used browser in the as most used browser in the world.world.
first appeared:first appeared: November 2004 November 2004market share:market share: 25% 25%
tabbed browsingtabbed browsingspell checkingspell checking incremental findincremental find
live bookmarkinglive bookmarkingdownload managerdownload manager private browsingprivate browsing
extensibilityextensibility
Easy to customize:Easy to customize: support for support for themes, icons, Personasthemes, icons, Personas
Redefine your browsing Redefine your browsing experience:experience: AdBlock Plus, AdBlock Plus, GreasemonkeyGreasemonkey
Enjoy safety:Enjoy safety: NoScriptNoScript
Fulfill any other needs:Fulfill any other needs: addons.mozilla.orgaddons.mozilla.org
OperaOperaOpera is not only a browser – it combines surfing Opera is not only a browser – it combines surfing with email, IRC, BitTorrent and reading web with email, IRC, BitTorrent and reading web feeds. Additionally, Opera Mini is regarded as feeds. Additionally, Opera Mini is regarded as one of the best mobile browsers.one of the best mobile browsers.
first appeared:first appeared: December 9, 1996 December 9, 1996market share:market share: above 200 million users worldwide; shipping with above 200 million users worldwide; shipping with approximately 120 million mobile phonesapproximately 120 million mobile phones
Opera Software is Opera Software is one of the fewone of the fewcompanies to focus companies to focus on manyon manydifferent systems different systems with the samewith the sameeagerness.eagerness.
They even released They even released an Opera Mini an Opera Mini emulator in aid of emulator in aid of designersdesignersdeveloping for developing for mobile platforms.mobile platforms.
Reference and MediaReference and Media
apple.comapple.comcnet.comcnet.comweblogs.mozillazine.org/asaweblogs.mozillazine.org/asafavbrowser.comfavbrowser.comiconarchive.comiconarchive.commaximumpc.commaximumpc.commozilla.orgmozilla.orgopera.comopera.comremake23.deviantart.comremake23.deviantart.comtech-faq.comtech-faq.comvisualparadox.comvisualparadox.comwallbase.ccwallbase.ccwebcredible.co.ukwebcredible.co.ukwikimedia.orgwikimedia.org
SoftwareSoftware
The GNU Image Manipulation The GNU Image Manipulation ProgramProgram
Microsoft Internet ExplorerMicrosoft Internet ExplorerApple SafariApple Safari
ChromiumChromiumChromeChrome
GeanyGeanyKolourPaintKolourPaintLibreOfficeLibreOffice
Mozilla FirefoxMozilla FirefoxOperaOpera
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Rosen DimovIvaylo Marinkov