About Mozilla Firefox

Cookies are stored on your computer by websites you visit and contain information such as site preferences or login status. This article describes how to delete Firefox cookies, other site data and cached web content.

During this period high-risk patches should avoid landing until after the Nightly version bump lands on mozilla-central on merge day. Past branch dates More details on contents of releases can be found in the release notes archive or Wikipedia: Firefox version history. We would like to show you a description here but the site won’t allow us. Firefox is Mozilla's popular Web browser, available for multiple platforms including Windows, macOS, and Linux on the desktop and all Android and iOS mobile devices. With broad compatibility, the latest in Web technologies, and powerful development tools, Firefox is a great choice for. Firefox 正體中文版下載:將所有超棒之處結合在一起,讓您的瀏覽變得更好。 (火狐瀏覽器 Mac/Windows/Linux 版).

FirefoxMozilla

在您的所有裝置而不只是瀏覽器也能獲得保護。 產品承諾. 了解各 Firefox 產品如何尊重您,保護您的資料。 Firefox Relay. 不用交出電子郵件地址就能註冊新帳號。 Firefox Private Network (beta) 保護您瀏覽器與網際網路之間的連線。 檢視所有產品.

  • If you just want to clear the Firefox cache, see How to clear the Firefox cache.
  • To clear your browsing history, cookies and temporarily cached files at once, see Delete browsing, search and download history on Firefox.
  • To prevent websites from storing cookies on your computer, see Block websites from storing cookies and site data in Firefox.

Table of Contents

To delete cookies and site data for a website you're currently visiting:

Firefox
  1. Click the padlock at the left of the address bar.
  2. Click .
About Mozilla Firefox

To delete cookies for any single website:

About Mozilla Firefox

Mozilla Firefox Download And Install

  1. In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ...
  2. Select the Privacy & Security panel and go to the Cookies and Site Data section.
  3. Click the button. The Manage Cookies and Site Data dialog will appear.
  4. In the Search websites field, type the name of the site whose cookies you want to remove. Items that match your search will be displayed.
    • To remove all cookies and storage data for the website, click .
    • To remove selected items, select an entry and click .
  5. Click .
  6. In the Removing Cookies and Site Data confirmation dialog that opens, click .
  7. Close the about:preferences page.

Update Firefox Browser

To learn more about managing site data in Firefox, see Manage local site storage settings.

Note: You can use the Storage Inspector to remove individual cookies for a specific website, via the right-click context menu. To open the Storage Inspector, go to the menu button Web Developer submenu or press Shift + F9 on the keyboard.
  1. In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ...
  2. Select the Privacy & Security panel and go to the Cookies and Site Data section.
  3. Click the button. The Clear Data dialog will appear.
    • Cookies and Site Data (to remove login status and site preferences) and Cached Web Content (to remove stored images, scripts and other cached content) should both be check marked.
  4. Click .

To delete only cookies while keeping other data, do the following:

  1. Click the menu button and click Library (or click the Library button in the toolbar).
  2. Click History and then click Clear Recent History….
  3. Set Time range to clear: to Everything.
  4. Select Cookies and make sure that other items you want to keep are not selected.
  5. Click to clear all cookies and close the Clear All History window.

Key resources

Firefox is Mozilla's popular Web browser, available for multiple platforms including Windows, macOS, and Linux on the desktop and all Android and iOS mobile devices. With broad compatibility, the latest in Web technologies, and powerful development tools, Firefox is a great choice for both Web developers and end users.

Firefox is an open source project; much of the code is contributed by our huge community of volunteers. Here you can learn about how to contribute to the Firefox project and you will also find links to information about the construction of Firefox add-ons, using the developer tools in Firefox, and other topics.

Learn how to create add-ons for Firefox, how to develop and build Firefox itself, and how the internals of Firefox and its subprojects work.

Developer release notes
Developer-focused release notes; learn what new capabilities for both Web sites and add-ons arrive in each version of Firefox.
Project documentation
Get detailed information about the internals of Firefox and its build system, so you can find your way around in the code.
Developer guide
Our developer guide provides details on how to get and compile the Firefox source code, how to find your way around, and how to contribute to the project.

Firefox channels

Firefox Nightly

Each night we build Firefox from the latest code in mozilla-central. These builds are for Firefox developers or those who want to try out the very latest cutting edge features while they're still under active development.

Firefox Developer Edition

This is a version of Firefox tailored for developers. Firefox Developer Edition has all the latest developer tools that have reached beta. We also add some extra features for developers that are only available in this channel. It uses its own path and profile, so that you can run it alongside Release or Beta Firefox.

Learn more about Firefox Developer Edition.

Firefox Beta

Every four weeks, we take the features that are stable enough, and create a new version of Firefox Beta. Firefox Beta builds are for Firefox enthusiasts to test what's destined to become the next released Firefox version.

Firefox

After stabilizing for another four weeks in Beta, we're ready to ship the new features to hundreds of millions of users in a new release version of Firefox.

Firefox Extended Support Release (ESR)

Firefox ESR is the long-term support edition of Firefox for desktop for use by organizations including schools, universities, businesses and others who need extended support for mass deployments.

Learn more about Firefox Extended Support Release.

Contents

Experimental features in Firefox
In order to test new features, Mozilla publishes a test version of the Firefox browser, Firefox Nightly, every day. These nightly builds of Firefox typically include experimental or partially-implemented features, including those for proposed or cutting-edge Web platform standards.
Firefox developer release notes
Below you'll find links to the developer release notes for every Firefox release. These lovingly-crafted notes provide details on what features and APIs were added and improved and what bugs were eliminated in each version of Firefox. All written to give developers like you the information they need most. You're welcome.
Privacy
This document lists privacy-related documentation.

Firefox profiles

If you find yourself using multiple Firefox channels—or just multiple configurations—on a regular basis, you should read how to use multiple Firefox profiles by turning Firefox's Profile Manager and other profile management tools to your advantage.

What Browser Does Firefox Use

See also