With the latest edition of Firefox, enhanced tracking prevention is turned on by default. This prevents things like cross-site trackers from following you as you jump around the web. Also, with Facebook being caught out almost daily for privacy problems, our Facebook Container extension makes a lot of sense.
It makes it harder for Facebook to track you around the web — similar to what Safari does to prevent cross-site tracking — but Firefox actually isolates your Facebook session into a separate container blocking Facebook from tracking what you do on other websites. Why do they need to know what you look up on WebMD anyway?
As far as security goes, Firefox is solid there as well. When you save your new password, we will prompt you to save to its built-in password manager, Lockwise. We also serve up users and account holders with another free and useful product called Monitor that automatically alerts you if your data is included in a known data breach.
So no matter what operating system you choose, Firefox has you covered with our security and privacy protections.
Apple is widely known for its closed ecosystem as it relates to creating software for its products. But inside the App Store, it does offer a section to developers to create plugins and add-ons to make the browser more robust. These extensions are also browsable through the App Store and easily added to Safari. Like Safari, Firefox encourages its enthusiastic developer community to create add-ons and extensions to the browser. Also, when you sign up for a Firefox account, you get access to unique services like Pocket that integrate directly into the browser.
The Pocket for Firefox button lets you save web pages and videos to Pocket in just one click, so you can read a clean, distraction-free version whenever and wherever you want — even offline. Firefox is also great for video and audio. And with good reason. It's the most popular alternative to Internet Explorer , and it's the browser of choice for those who want a customizable web experience. If you're still using Internet Explorer, we came up with five great reasons to make the switch to Firefox 4.
As an open source browser, Firefox has several advantages over Explorer. The biggest one being open source software helps drive innovation. Tabbed browsing, add-ons, and customization all started with Firefox.
And this kind of innovation will only continue. It's also more friendly to developers, allowing them to come up with new ways to enhance your browsing experience through add-ons, extensions, and themes. The mobile version even works with Android and syncs with your desktop. Gecko now uses the HTML5 parser, which fixes bugs, improves interoperability, and improves performance.
A look at improvements to web forms in HTML5. This attribute, common to all elements, is used to hide content in a webpage that is not currently relevant to the user. A guide to using the new WebSockets API for real-time communication between a web application and a server.
Note that WebSockets as implemented in Firefox 4 is not compatible with the final standard, and should not generally be used. Support for -moz-calc has been added. The -moz-image-rect function makes it possible to use subrectangles of images as a background-image. You can use the -moz-element CSS function and the document.
Changes have been made to what information can be obtained about the style of visited links using CSS selectors. This may affect some web applications. The new open WebM video format is supported by Gecko 2. The preload attribute from the HTML5 specification has been implemented, replacing the previously-implemented and no longer supported autobuffer attribute.
This lets you control the positioning of each character in a string individually. Support has been added for JavaScript typed arrays; this allows you to manipulate buffers containing raw data using native data types. The Range object now has range. See bug The existing document history object, available through the window. A new event has been added which, in concert with the window.
Content Security Policy CSP is a Mozilla proposal designed to help web designers and server administrators specify how content on their web sites interacts. The goal is to help detect and mitigate attacks including cross-site scripting and data injection attacks. This allows sites to indicate whether or not their pages can be used in frames, and if so, whether or not to restrict that to the same origin. As a means to reduce the amount of data and entropy sent out in HTTP requests see bug , the crypto strength and language tokens have been removed from the user agent string.
For an overview of the changes implemented in JavaScript 1. The Web Console tool is a useful debugging aid for web developers and extension developers alike. You can re-enable it by changing the devtools. For helpful tips on updating existing extensions for Firefox 4, see Updating extensions for Firefox 4. There are several key changes that break compatibility with existing add-ons, so be sure to read that article.
If you're a theme developer, you should read Theme changes in Firefox 4 to understand some critical changes you'll need to be aware of. The Services. The new Add-ons Manager provides information about installed add-ons, support for managing them, and provides ways to install and remove add-ons. The new popup notifications module makes it easy to present attractive, non-modal notifications to the user.
You can see how to use this API in Using popup notifications. The DownloadLastDir. This module handles issues related to private browsing for you. The PerfMeasurement. A new type of worker for privileged code; this lets you use things like js-ctypes from workers in extensions and application code.
Support for non-standard touch events has been added; these let you track multiple fingers moving on a touch screen at the same time. In addition to supporting app tabs, these changes also change the tab bar into a standard toolbar, which lets the user drag toolbar buttons into it. There is, however, a whitelist feature that can be used to allow specific domains to load remote XUL. The status bar has been removed in favor of the new add-on bar. You'll need to update your extension to use this if you've been adding UI to the status bar in the past.
You can now hide the browser's chrome when it's desirable to do so; for example, about:addons does this. In addition to the specific changes referenced below, it's important to note that there are no longer any frozen interfaces. All interfaces are now unfrozen, regardless of what the documentation may say. Firefox Focus Simply private mobile browsing. Privacy Promise Learn how Firefox treats your data with respect. Firefox Blog Read about new Firefox features and ways to stay safe online.
Release Notes Get the details on the latest Firefox updates. Facebook Container Help prevent Facebook from collecting your data outside their site. Pocket Save and discover the best stories from across the web. Mozilla VPN Get protection beyond your browser, on all your devices. Product Promise Learn how each Firefox product protects and respects your data.
Firefox Relay Sign up for new accounts without handing over your email address. Mozilla Foundation Meet the not-for-profit behind Firefox that stands for a better web. Get involved Join the fight for a healthy internet. Careers Work for a mission-driven organization that makes people-first products. Mozilla Blog Learn about Mozilla and the issues that matter to us. Close Innovation menu Mozilla Hubs Gather in this interactive, online, multi-dimensional social space. Firefox Developer Edition Get the Firefox browser built just for developers.
Firefox Reality Explore the web with the Firefox browser for virtual reality. Common Voice Donate your voice so the future of the web can hear everyone.
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