.. _browser-compatibility:

##################### Browser Compatibility #####################

Extensive browser support is an important goal for MathJax; at the same time, MathJax does require a certain minimum level of browser functionality. While MathJax version 2 went to great lengths to remain compatible with early versions of most browsers (even back to IE6), MathJax version 3 and above relies on more modern browser features, and so older browsers are no longer supported.

The CommonHTML and SVG output supports all modern browsers (Chrome, Safari, Firefox, Edge), and most mobile browsers.

.. warning::

While MathJax v3 still supported Internet Explorer version 11, MathJax v4 no longer supports any version of Internet Explorer. While IE may be able to handle some MathJax expressions, we no longer do any testing in IE, and make no accommodations to get MathJax to work with IE.

Please file issues on GitHub <https://github.com/mathjax/MathJax/issues>__ if you notice inaccuracies or problems. It may help to add a screenshot; we suggest services such as browsershots.org <https://browsershots.org>, saucelabs.com <https://saucelabs.com>, or browserstack.com <https://browserstack.com>__ for obtaining them.

.. _viewport-meta:

Viewport meta tag

The viewport meta tag provides the browser with instructions regarding viewports and zooming. This way, web developers can control how a webpage is displayed on a mobile device.

Incorrect or missing viewport information can confuse MathJax's layout process, leading to very small font sizes. We recommend that you use standard values such as the following

.. code-block:: html

at the top of the <head> section of your HTML pages.

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