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You can learn more about SharedArrayBuffer in this code cartoon introduction and this explainer article from last year. when sharing memory, just like in any other multi-threaded language. The only downside? Developers have to care about thread safety, mutexes, etc. This finally makes efficient multi-threading a reality on the Web. SharedArrayBuffer and Atomics objects are new JavaScript primitives that allow workers to share and simultaneously access the same memory.See the Pen Hello IntersectionObserver by Dan Callahan on CodePen. You can read more in my article on IntersectionObserver from last week. The IntersectionObserver API allows the browser to respond to the visibility of elements on a page far more efficiently and reliably than existing hacks with polling or invisible Flash movies.With the announcement of Flash’s end of life, and in coordination with Microsoft and Google, Firefox 55 now requires users to explicitly click to activate Flash on web pages as we work together toward completely removing Flash from the Web platform in 2020.įirefox 55 introduces several new low-level capabilities that help improve the performance of demanding web applications:.Of course, tabs that are playing audio or video are not throttled, so music in a background tab won’t stutter. This is in addition to our usual 1 second throttling for background tabs, and helps ensure that unused tabs can’t invisibly ruin performance or battery life. After a short grace period, Firefox will increase the minimum setInterval or setTimeout for callbacks scheduled by tracking scripts to 10 seconds while the tab is in the background. Firefox now uses its built-in Tracking Protection lists to identify and throttle tracking scripts running in background pages.Multiple content processes debuted in Firefox 54, and allow Firefox to take better advantage of modern, multi-core CPUs, while still being respectful of RAM utilization. Users can now adjust Firefox’s number of content processes from within Preferences.This improvement is primarily thanks to the tireless work of an external contributor, Kevin Jones, who virtually eliminated the fixed costs associated with restoring tabs. Today, with Firefox 55, it takes just 15 seconds and 0.5 GB of memory. With Firefox 54, starting up his instance of Firefox took 300 seconds and 2 GB of memory. For reasons unknown, Dietrich Ayala has a Firefox profile with 1,691 open tabs.
Restoring a session or restarting Firefox with many tabs open is now an order of magnitude faster.
#Download mozilla firefox desktop icon upgrade#
Existing installations will upgrade to 64-bit with our next release, Firefox 56.
#Download mozilla firefox desktop icon windows#
New installations of Firefox on Windows will now default to the more stable and secure 64-bit version.We’ve implemented several new features to keep Firefox itself running quickly: There are also new, optional columns for cookies, protocol, scheme, and more that can be hidden or shown inside the Network panel, as seen in the screenshot above. Over in DevTools, the Network panel now supports filtering results with queries like “ status-code:200“. with object literals or for destructuring assignment, and the TC39 proposal also provides a concise overview of this feature. New Features for Developersįirefox 55 supports several new ES2017/2018 features, including async generators and the rest/spread (“. To learn more, check out vr., or dive into A-Frame, an open source framework for building immersive VR experiences on the Web. As the originators of WebVR, Mozilla wanted it to embody the same principles of standardization, openness, and interoperability that are hallmarks of the Web, which is why WebVR works on any device: Vive, Rift, and beyond. Firefox on Windows is the first desktop browser to support the new WebVR standard (and macOS support is in Nightly!).