At start of the web, lots of companies try to do something. the first which was really something "huge" was mozaic.
A little after, the ie vs netscape war begin, which was more on the favor of Netscape until they stop developping it.
Then mozilla (suite at the time, firefox was not even call firefox) used the open-source of netscape (7.2 if i remember correctly) to do the 1.4 version of the mozilla suite.
Netscape dispear, chrome was not born yet, XP got more and more market share and IE 6 become the most used web-browser.
As there was no other competitor with enought market share, IE dev was almost stopped until Microsoft got a blame by the UE( because they impose IE with windows). Microsft answer it with the ballot screen.
At the same time, company like google, divx, adobe, etc. tried to push firefox with their software download "for a better web experience".
Google didn't really approve mozilla choice, and start to do their own browser using the only other good free/open source layout engine : webkit.
As google doesn't support the strategy made by apple for webkit they duplicate the code and create blink.
From my point of view :
* ie is often used as default browser by people who don't know (or care) about alternative. It works everywhere (due to the importance of Microsoft operating system)
* Firefox was the "real" first alternative since netscape and now, it's only used by the first persons who leave IE or people who don't want a chrome (or chrome like browser).
* chrome is used by most of people who doesn't want to use IE (on MS platform) because it's fast, secure and google-made.
* opera (12, not the 15+ version) is used by people who know it exists, and who succeed to adopt it (it's not easy, but the tons of native features was worth it). Now it's just a chrome like browser with no real plus (actually, maybe future versions like v25 will have something new)
* maxthon, qupzilla, ironsware, iceweasel and other are use by a minority of people, who know these alternatives and found something else from other major browser (not google, real open source, etc. )
In my case, i still use opera 12 as main browser at home, because other web-browser doesn't have its feature (multiple display interface, native adblock, dragonfly, etc.) and seamonkey/ie as backup. A t work i only use opera from dev channel (to find when i will do the switch from v12) and IE.
Now, i don't recommend one web browser more than an other, as opera 12 won't last long now.
Firefox and chrome have almost the same feature and the same extension catalog, so there is no point here. the only advantage of chrome above firefox is the editor.
As google provides a lots of web services (gmail, calendar, youtube), they will never have critical issue on chrome (if google decide to do something specific on its webservice, chrome will always be able to display it correctly. Mozilla might have issue to follow, especially if google decide to use something that mozilla can't support, like audio codec in html 5:
http://en.wikipedia.org/wiki/HTML5_Audio). But using chrome can also give google full control of your web utilisation... So try different web-browser to find the one which suit you
