In short, each new version of Firefox continues to improve and optimize the service. After that, I was directed to the Extended Support Release. I did the basic research and was directed Firefox version 78. I am looking for a version of Firefox that will run under that version of Mac/OS. This falls into the class of the elite browsers. For unfortunate reasons too tedious and mundane to discuss here, I am stuck with Mac/OS 10.11.6. The competition in the browser market is stiff a browser application needs to be exceptionally good to stand out from the others in the marketplace. The browser gets better and better with each version, becoming more fluid and stronger competition for its main rivals. Firefox for Mac/OS 10.11.6 (Mac/OS X El Capitan. This version has also improved the loading speed for sites and resource consumption to avoid excessive memory usage like previous versions. Firefox has improved its performance and stability with optimized JavaScript engines and rendering, greater compatibility with HTML5, independent processes for browser plug-ins, and more.
The latest installment is focused on improving its technical aspects, so the appearance is almost the same as in previous versions. Its many features include enabling the simultaneous browsing of multiple pages with its tab system, supporting most existing web standards, and offering a personalized experience with extensions, plugins, and themes created by the community.
Mozilla continues to work on further improvements for its flagship product: the free and open-source browser, Firefox.