Well. LFG is designed to replace blizzard's premade groups entirely just like custom raid frame addons (like grid, grid2, healbot) did towards blizzard's compact raid addon. We can actually do little customization towards Blizzard's UI unless we write our own "UI". Instead, just use LFG to create/search groups instead of blizzard's UI since it sucks.
On March 23, 2018, Zygor Guides announced that they would end support for their ESO guide. Later, via answers given on the forums, they confirmed they would not add a leveling guide for Summerset. Their guide is Public Domain with Zygor's blessing for the community to create guides. So I took it upon myself to create a Summerset guide for the ESO community.
So far it seems like the guides direct you to the easiest/best way to get stuff done. The waypoints they use are better than some other places because it tells you how to get to a certain place rather than saying "Go to X place" it says "Go out of the building and down the path" then once you do those things it says "Go kill X mob Y mob and Z mob until you have A items". It has given some pointers too for an area it was like "If you kill a lava thing it gives you a buff so you can walk on the lava" so it tells you to kill some lava things (JC quest in WoD)
Often the name modification (or "mod" for short) is used interchangeably with AddOn. More specifically, a mod is a third-party AddOn that alters or enhances some aspect of the game's interface. Mods can perform a wide variety of tasks, including adding new buttons to the screen, altering the built-in player and party frames. In extreme cases, mods completely supplant the standard game's interface, usually offering more advanced functionality.