The first part of your question ("can anyone recommend a browser" has been answered but the second part ("and why") seems to have been ignored.
As others have indicated, Firefox is the most popular browser with the 'regulars' here in AB's Technology section. (It's also the most popular browser in the world, when 'popular' is defined by active choice, rather than by what people use 'just because it's there. Chrome is in second place).
There are several reasons for using Firefox but one of the most important reasons is that it's easily customised to your own needs, through the use of 'add-ons'. The most popular add-ons among AB members include the British English Dictionary
https://addons.mozill...h-english-dictionary/
and Adblock Plus (which gets rid of the ads on pages like this one, resulting in much faster loading)
https://addons.mozill...x/addon/adblock-plus/
Hints:
(i) If you install the British dictionary, check that it's working by typing 'color colour' into an AB answer field. If 'color' is underlined in red (as being incorrect), the British dictionary is working and you don't need to do anything else. If 'colour 'is underlined, right-click on it and select 'Languages > English (United Kingdom). The dictionary will then work properly from then on.
(ii) If you install Adblock Plus you'll be invited to subscribe to a list. You MUST choose at least one subscription, otherwise Adblock Plus won't know what to block. 'EasyList' will probably meet you needs.
There are loads of other add-ons which you might want to take a look at. For example, if you want to be able to save YouTube videos to your hard drive with just a couple of clicks, this will do the job for you:
https://addons.mozill...be-video-downl-10137/
Chris