One of my interests is browser history, so I'll list these. Before I begin, shout-outs to Perl, GNU, Windows 2000, Windows 95, Norton Commander, Windows Commander, Linux, BSD, Digg 1.0, irssi, and, of course, HN.
Mosaic, the original "best viewed with" browser, which brought us inline graphics.
Netscape 3.0, the first "to the masses" browser, which made not only browsing, but authoring too, accessible for anyone and everyone.
Internet Explorer 3.0, not quite 10x, but it was the first browser with a truly beautiful UI/toolbar, still one of the nicest looking ever in my opinion.
Lynx, one of the oldest browsers, allowing Web access to countless individuals otherwise in countless scenarios and situtions.
Opera 3.0, the super fast browser which tried to stick to standards. Along with my own add-on to give it status-colored tabs, this was my first "better than mainstream" browser experience.
Internet Explorer 4.0, the first browser which had true DOM, true dynamic HTML, if you coded carefully.
Netscape 4.0, the fastest browser for a long time, one I stuck with longer than most gave up. Proper caching, and blazing fast rendering of uncomplicated HTML.
Internet Explorer 6.0, with reasonable standards support, DOM, CSS, and embeddability with full DOM access from the parent app, a breakthrough in scraping abilities.
Opera 12.0, even today one of the best standards-supporting rendering engines, fast beyond imagination, fully Acid compliant, stable, and one of the first single-key shortcut supporters.
Mozilla Suite and Firefox 1.0, the best browser of its day, not only fast and flexible, but allowing previously unimaginable UI improvements and enhancements, spurring an era of creativity in development.
Vimium/VimFX, a new level of keyboard accessibility in browsers.
Links, and Links2-GUI, a new level of rendering prowess and accessibility in the console
w3m, the console browser beast for nerds, with even better accessibility (albeit with a learning curve) and customizability.
And, last of not least, the King of hacker-friendly browsing as of today, qutebrowser, a whole new level of stability, accessibility, and clean design, albeit with a week-long learning curve.