There are five main browsers which are Google Chrome, Mozilla Firefox, Internet Explorer and Edge, Safari and Opera. All browsers are available to the audiences and they have the option to choose. In order to make all the elements work in every browser, the website needs to be tested in all of the browsers.
W3Counter.com (April 2018)
These tools are a guidance about what is supported in each browser just in case there is one browser that cannot support it. However, they will not provide you alternatives, but there are forums including Stack Overflow to support with building and styling sites. Furthermore, most browsers have 'Inspect Element' or 'Inspect' (Chrome) tool to help identify layout issues.
To keep the site running fast, is by making sure that every bit of JavaScript is working without any errors. The 'Inspect Element' or 'Inspect' (Chrome) tool will show any issues in the console tab.
Ideally, when browser testing, pick a browser that is suitable for all preferences while working on the website. Browserstack is a good software for testing websites in browsers, including Safari and Internet Explorer.
The current browsers used to test are:
11th Jan 2019
Computer World
Microsoft's decision to adopt the Chromium open-source code to power its Edge browser could mean a sooner-than-expected end to support for Internet Explorer.
Read more
3rd Dec 2018
Windows Central
Microsoft is throwing in the towel with Edge and is building a new web browser for Windows 10, this time powered by Chromium.
Read more
12th Jan 2016
Daily Mail
With the launch of Safari 6.0 for OS X 10.8 Mountain Lion and the release of a 6.0 update for existing Safari users on OS 10.7 Lion, Apple appears to have shelved efforts to continue developing Safari for Windows.
Read more