Firefox Browser Online



  1. Firefox Browser Https //onlinexperiences.com/ Launch/event/showkey=93057
  2. Foxfire Home Page Mozilla Firefox
  3. Firefox Browser Chip Online

Some browsers implement Online/Offline events from the WHATWG Web Applications 1.0 specification.

Firefox browser online open

Overview

39 results for 'firefox browser for kindle fire' Firefox for Fire TV. 4.1 out of 5 stars 276,998. App Free Download. Available instantly on compatible. Run IE, Chrome, Firefox, and other browsers online, right on your desktop or tablet. Works on PC, Mac, iPad, and Android tablets. Thousands of configurable, ready-to-use apps available instantly. Firefox Browser, also known as Mozilla Firefox or simply Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. Firefox uses the Gecko layout engine to render web pages, which implements current and anticipated web standards.

Online

In order to build a good offline-capable web application, you need to know when your application is actually offline. You also need to know when your application has returned to an 'online' status again. Effectively, the requirements break down as such:

  1. You need to know when the user comes back online, so that you can re-synchronize with the server.
  2. You need to know when the user is offline, so that you can queue your server requests for a later time.

Mozilla Firefox is an open-source web browser developed by Mozilla. Firefox is available for Windows, macOS, Linux, and Android. Firefox has been the second most popular web browser since January, 2018. Firefox uses the Gecko rendering engine.

It is this process that online/offline events help to simplify.

Unfortunately, these events aren't fully reliable. If you need greater reliability, or if the API isn't implemented in the browser, you can use other signals to detect if you are offline including using service workers and responses from XMLHttpRequest.

API

navigator.onLine

navigator.onLine is a property that maintains a true/false value (true for online, false for offline).

This property is updated whenever the user switches into 'Offline Mode' (File → Work Offline in Firefox). Additionally, this property should update whenever a browser is no longer capable of connecting to the network. According to the specification:

The navigator.onLine attribute must return false if the user agent will not contact the network when the user follows links or when a script requests a remote page (or knows that such an attempt would fail)...

Firefox 2 updates this property when switching to/from the browser's Offline mode. Firefox 41 updates this property also when the OS reports a change in network connectivity on Windows, Linux, and OS X.

This property existed in older versions of Firefox and Internet Explorer (the specification based itself off of these prior implementations), so you can begin using it immediately. Network status autodetection was implemented in Firefox 2.

'online' and 'offline' events

Firefox 3 introduces two new events: 'online' and 'offline'. These two events are fired on the <body> of each page when the browser switches between online and offline mode. Additionally, the events bubble up from document.body, to document, ending at window. Both events are non-cancellable (you can't prevent the user from coming online, or going offline).

Firefox 41 fires these events when the OS reports a change in network connectivity on Windows, Linux, and OS X.

You can register listeners for these events in a few familiar ways:

  • using addEventListener on the window, document, or document.body
  • by setting the .ononline or .onoffline properties on document or document.body to a JavaScript Function object. (Note: using window.ononline or window.onoffline will not work for compatibility reasons.)
  • by specifying ononline='...' or onoffline='...' attributes on the <body> tag in the HTML markup.
Use

Example

There's a simple test case that you can run to verify that the events are working (does not work in Chrome due to attaching the event listener to document.body).

Here's the JavaScript part:

A touch of CSS

Online

And the corresponding HTMLXXX When mochitests for this are created, point to those instead and update this example -nickolay

Here's the live result

Notes

Firefox Browser Https //onlinexperiences.com/ Launch/event/showkey=93057

If the API isn't implemented in the browser, you can use other signals to detect if you are offline including using service workers and responses from XMLHttpRequest.

Foxfire Home Page Mozilla Firefox

References

Firefox Browser Chip Online

  • The bug tracking online/offline events implementation in Firefox and a follow-up