A main ingredient to a well-made browser is its functionality. What can it do?  Almost all five browsers are equal when it comes to tabs, bookmarks, auto-completion of fields, but only { -brand-name-firefox } and { -brand-name-safari } offer add-ons/extensions, which are kind of like apps for your browser to make it more private, powerful or just more fun.
Prif nodwedd porwr da yw ei ymarferoldeb. Beth all ei wneud? Mae bron pob un o'r pum porwr yn gyfartal o ran tabiau, nodau tudalen, cwblhau meysydd yn awtomatig, ond dim ond { -brand-name-firefox } a { -brand-name-safari } sy'n cynnig ychwanegion/estyniadau, sy'n fath o fel apiau i'ch porwr i'w wneud yn fwy preifat, pwerus neu'n fwy o hwyl.