My HTML code is as follows:
<html>
<head>
<title>Title</title>
<meta charset="utf-8">
<meta name="description" content="description">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="apple-touch-icon" sizes="180x180" href="apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="favicon-16x16.png">
<link rel="manifest" href="site.webmanifest">
<link rel="mask-icon" href="safari-pinned-tab.svg" color="#4faf54">
<meta name="msapplication-TileColor" content="#2b5797">
<meta name="theme-color" content="#ffffff">
<link rel="stylesheet" href="style/style.css">
<script src="https://code.jquery.com/jquery-3.5.1.js" integrity="sha256-QWo7LDvxbWT2tbbQ97B53yJnYU3WhH/C8ycbRAkjPDc=" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9dfef5fcefe9b3f7eeddafb3a4b3ae">[email protected]</a>/dist/Chart.min.js" integrity="sha256-R4pqcOYV8lt7snxMQO/HSbVCFRPMdrhAFMH+vr9giYI=" crossorigin="anonymous"></script>
</head>
<body>
<nav class="navbar navbar-static-top">
<span class="navbar-brand">Title</span>
</nav>
<div class="container">
<div class="row">
<div class="col-2">
<h1>TEST</h1>
</div>
<div class="col-2">
<h1>TEST</h1>
</div>
<div class="col-2">
<h1>TEST</h1>
</div>
<div class="col-2">
<h1>TEST</h1>
</div>
</div>
</div>
</body>
</html>
Despite my efforts, I can't seem to get the columns to align next to each other and they always stack vertically.
Even copying the grid system example from the documentation hasn't helped in solving this issue.
For reference, I am using the latest version of Firefox on a Mac device.