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