I dislike using The Kennel via mobile browser as the ads are painful/very annoying.
I don't use the app and I know people have had issues with it in the past.
IE is like a penis .... gets the job done and does mostly what you need it to do.
Chrome - full of exploits/backdoors, fucks around with non HTTPS sites, and feeds back info to Google. Literally the other day there was an exploit released for Chrome which hard locks Windows 10 if triggered (by way of an ad embedded into a website).
Firefox - haven't had any real issues with.
Internet Explorer - Biggest gripe I have is the 1.2-1.6GB iexplore.exe overflow bug, whereby if iexplore.exe hits 1.2/1.6GB memory usage, it mucks up and you have to terminate iexplore.exe (not much different to the current overflow issue with Chrome.
I actually use all 3 browsers on my PC:
IE - for general web surfing and everything.
Chrome - for Foxtel Go.
Firefox - for everything else or things that don't load in IE (e.g DailyMail, Twitter videos, some websites).