Opera is a web browser and Internet suite developed by the Opera Software company. Opera handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, IRC online chatting, downloading files via BitTorrent, and reading web feeds. Opera is offered free of charge for personal computers and mobile phones, but for other devices it must be paid for.

Features of Opera include tabbed browsing, page zooming, mouse gestures, and an integrated download manager. Its security features include built-in phishing and malware protection, strong encryption when browsing secure web sites, and the ability to easily delete private data such as cookies and browsing history by simply clicking a button.

Opera runs on a variety of personal computer operating systems, including Microsoft Windows, Mac OS X, Linux, FreeBSD, and Solaris. Though evaluations of Opera have been largely positive, Opera has captured only a fraction of the worldwide personal computer browser market.

Features

The Opera Software company claims that Opera is "the fastest browser on Earth". One set of third-party speed tests concluded that Opera 9.5 was indeed faster than Internet Explorer 7 and prerelease versions of Firefox 3 and Safari 3. Technology website ZDNet's speed tests showed that out of Internet Explorer 7, Safari 3, and pre-release versions of Firefox 3 and Opera 9.5, Opera is the fastest in some areas, but the only browser that Opera clearly outperformed was Internet Explorer.

Opera includes built-in tabbed browsing, pop-up blocking, fraud protection, a download manager and BitTorrent client, a search bar, and a web feed aggregator. Opera also comes with an e-mail client called Opera Mail and an IRC chat client built in.

Opera includes a "Speed Dial" feature, which allows the user to add up to nine links (or more, by editing the speeddial.ini file) to the page displayed when a new tab is opened. Thumbnails of the linked pages are automatically generated and used for visual recognition on the Speed Dial page. Once set up, this feature allows the user to more easily navigate to the selected web pages.

Opera supports "Opera Widgets", small web applications that start from within Opera. Alongside Widgets, "User JavaScript" may be used to add custom JavaScript to web pages. Greasemonkey support is limited, and there is no interface to manage scripts or toggle 'Greasemonkey-on' functionality.

Opera is extensible in a third way via plug-ins, relatively small programs that add specific functions to the browser. However, Opera limits what plug-ins can do and does not support full-fledged third-party extensions to the browser. Opera does this as a quality assurance measure, so that third-party extensions cannot introduce bugs

Privacy and security

Opera has several security features visible to the end user. One is the option to delete private data, such as cookies, the browsing history, and the cache, with the click of a button. This lets users erase personal data after browsing from a shared computer.

When visiting a secure web site, Opera encrypts data using either SSL 3 or TLS, both of which are highly secure encryption protocols. It then adds information about the site's security to the address bar. It will also check the web site that is being visited against blacklists for phishing and malware, and warn if it matches any of these lists. This behavior is enabled by default, but the user may opt to not make such checks automatically. If this check is disabled, the user can still check sites individually by opening a Page Info dialog

The user can protect every saved password stored in Opera with a master password. This prevents malware from accessing those passwords unless the master password is known. To catch security flaws and other bugs before they are exploited or become a serious problem, the Opera Software company maintains a public web form where users can submit bug reportsAccording to Secunia, a computer security service provider, the mean average of unpatched vulnerabilities in the last 365 days is 0.01. This stands in contrast to Firefox (5.77), Internet Explorer (38.3), and Safari (1.54).

In January 2007, Asa Dotzler of the competing Mozilla Corporation accused the Opera Software company of downplaying information about security vulnerabilities in Opera that were fixed in December 2006. Dotzler claimed that users were not clearly informed of security vulnerabilities present in the previous version of Opera, and thus they would not realize that they needed to upgrade to the latest version or risk being exploited. Opera responded to these accusations the next day.

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Mozilla Firefox

Mozilla Firefox is a free web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation. Firefox had 22.48% of the recorded usage share of web browsers as of April 2009, making it the second most popular browser in terms of current use worldwide, after Internet Explorer.

To display web pages, Firefox uses the Gecko layout engine, which implements some current web standards in addition to a few features which are intended to anticipate likely additions to the standards.

Firefox features include tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and an integrated search system that uses the user's desired search engine (Google by default in most localizations). Functions can be added through add-ons, created by third-party developers, of which there is a wide selection, a fact that has attracted many of Firefox's users.

Features

Features included with Firefox are tabbed browsing, spell checker, incremental find, live bookmarking, an integrated download manager, keyboard shortcuts, and an integrated search system that uses the user's desired search engine.

Users can customize Firefox with browser "add-ons". Mozilla maintains a repository of these developed extensions and themes at addons.mozilla.org with nearly 6,500 available as of December 2008.

Firefox provides an environment for web developers in which they can use built-in tools, such as the Error Console or the DOM Inspector, or extensions, such as Firebug.

Firefox can also be installed in an USB drive and run directly from it.

Security

Firefox uses a sandbox security model, and limits scripts from accessing data from other web sites based on the same origin policy. It uses SSL/TLS to protect communications with web servers using strong cryptography when using the https protocol. It also provides support for web applications to use smartcards for authentication purposes.

The Mozilla Foundation offers a "bug bounty" to researchers who discover severe security holes in Firefox. Official guidelines for handling security vulnerabilities discourage early disclosure of vulnerabilities so as not to give potential attackers an advantage in creating exploits.

Because Firefox has fewer and less severe publicly known unpatched security vulnerabilities than Internet Explorer (see Comparison of web browsers), improved security is often cited as a reason to switch from Internet Explorer to Firefox. The Washington Post reports that exploit code for critical unpatched security vulnerabilities in Internet Explorer was available for 284 days in 2006. In comparison, exploit code for critical security vulnerabilities in Firefox was available for 9 days before Mozilla shipped a patch to remedy the problem.

A 2006 Symantec study showed that although Firefox had surpassed other browsers in the number of vendor-confirmed vulnerabilities that year through September, these vulnerabilities were patched far more quickly than those found in other browsers. Symantec later clarified their statement, saying that Firefox still had fewer security vulnerabilities than Internet Explorer, as counted by security researchers. As of April 23, 2009, Firefox 3 has no security vulnerabilities unpatched according to Secunia.Internet Explorer 7 has nine security vulnerabilities unpatched, the most severe of which was rated "moderately critical" by Secunia.

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Internet Download Manager (IDM) is a tool to increase download speeds by up to 5 times, resume and schedule downloads. Comprehensive error recovery and resume capability will restart broken or interrupted downloads due to lost connections, network problems, computer shutdowns, or unexpected power outages. Simple graphic user interface makes IDM user friendly and easy to use.Internet Download Manager has a smart download logic accelerator that features intelligent dynamic file segmentation and safe multipart downloading technology to accelerate your downloads. Unlike other download managers and accelerators Internet Download Manager segments downloaded files dynamically during download process and reuses available connections without additional connect and login stages to achieve best acceleration performance.

Internet Download Manager supports proxy servers, ftp and http protocols, firewalls, redirects, cookies, authorization, MP3 audio and MPEG video content processing. IDM integrates seamlessly into Microsoft Internet Explorer, Netscape, MSN Explorer, AOL, Opera, Mozilla, Mozilla Firefox, Mozilla Firebird, Avant Browser, MyIE2, and all other popular browsers to automatically handle your downloads. You can also drag and drop files, or use Internet Download Manager from command line. Internet Download Manager can dial your modem at the set time, download the files you want, then hang up or even shut down your computer when it's done.

Other features include multilingual support, zip preview, download categories, scheduler pro, sounds on different events, HTTPS support, queue processor, html help and tutorial, enhanced virus protection on download completion, progressive downloading with quotas (useful for connections that use some kind of fair access policy or FAP like Direcway, Direct PC, Hughes, etc.), built-in download accelerator, and many others.

Version 5.17 adds IDM download panel for web-players that can be used to download flash videos from sites like YouTube, MySpaceTV, and Google Videos. It also features complete Vista support, YouTube grabber, redeveloped scheduler, and MMS protocol support. The new version also adds improved integration for IE and IE based browsers, redesigned and enhanced download engine, the unique advanced integration into all latest browsers, improved toolbar, and a wealth of other improvements and new features.

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Mengapa menggunakan SMADAV ???

1. Teknologi SmaRTP, SmaRT-Protection

• Proteksi paling ringan di dunia, tercepat dan paling sedikit memakai resource komputer.
• tidak hanya bergantung pada banyaknya database/signature, tapi juga mempunyai kepintaran (algoritma cerdas) yang bisa memproteksi komputer dari virus baru sekalipun.
• deteksi otomatis flashdisk seketika setelah dicolok di komputer.
• deteksi otomatis ketika ada virus saat Anda sedang meng-explore folder
• dapat digabungkan sempurna dengan proteksi semua produk antivirus manapun.
• mendukung semua OS Windows XP & Vista

• teknologi scanner antivirus tercepat didunia hanya ada di Smadav, paling sedikit memakai resource komputer.
• banyak metode heuristik untuk pendeteksian virus baru dan belum ada di database
• database virus terlengkap di Indonesia karena mempunyai database yang digabungkan metode pintar pendeteksian virus
• ada fitur "1 virus by user" dan pendeteksian tingkat keamanan sistem komputer "risk value"
• mendukung semua OS Windows XP & Vista