I&#x27;m not sure what software is that. When you assume, etc...<p>I&#x27;ve started with Mosaic and Netscape (and on Sun OS for that matter), used Mozilla for a few years, then FF on Windows, and finally Safari and then Chrome for as long as both existed on the Mac (and have even used KHTML --in the form of Konqueror-- for light browsing on my dev box for a couple of years in the early 00s). Those, as an end user.<p>As a web dev for testing, besides IE, I have also fired up Opera for years, including back when it had an ugly QT facade and with its own rendering engine. I&#x27;ve never liked it though, and it never stuck to be used as the main browser.<p>Being able to toggle Javascript on&#x2F;off with a single checkbox: all browsers have that.<p>Doing it per page: again, as I said, dead easy to add, e.g.: <a href="https:&#x2F;&#x2F;chrome.google.com&#x2F;webstore&#x2F;detail&#x2F;quick-javascript-switcher&#x2F;geddoclleiomckbhadiaipdggiiccfje?hl=en" rel="nofollow">https:&#x2F;&#x2F;chrome.google.com&#x2F;webstore&#x2F;detail&#x2F;quick-javascript-s...</a><p>So, &quot;only Opera has that&quot; is BS.<p>&quot;Oh, but Opera has it built-in and I can&#x27;t be bothered to install a third party exception&quot;, on the other hand, might be true -- that doesn&#x27;t make that much of a valid reason to stick to an older browser to me eyes.