This is not a question really but just seeking opinions.
I have always used Internet Explorer as I am sure many others have done until very recently when other choices became available. I am still loyal to Int Explorer but my kids use Google chrome. Just today when talking to a software provider which I use, I was told that Int Exp is not reliable.
Other choices did not become available, they were already available and have been for years.
In fact some of these browsers were available before Internet Explorer ever became available.
Microsoft were quite late to catch on to the internet (Bill Gates admitted it years ago) and there were all sorts of other browsers available before IE was available.
But of course Microsoft know how to use (or abuse) their power so they made sure they shipped IE with Windows, and now it is the worlds most used browser.
The reason it is risky ("not reliable" you say) to use IE is that because it is used by so many people hackers and virus writers tend to focus on IE when writing their viruses.
They tend not to write them for Firefox and other browsers (not that I am saying you are totally safe using other browsers).
I have used Firefox for years because the add ons make it very useful to me. I can't see any ads on this page because I use Adblock Plus; all my pcs are synched so that bookmarks, tabs, passwords etc are the same on each; I can search Google, Wikkipedia, eBay, Amazon, Play.com and many others directly from my search bar; I have enjoyed a bookmark toolbar for years (fairly new to IE) and it looks the way I want it to look.
I use Firefox. Tried Chrome, but regardless of changing every relevant setting I can find, it insists on taking me Greek web sites. This is the problem with the Yanks. Because they rarely go abroad themselves, they think that everyone only uses their computer in their home country.