Many ways to customize it but rather high memory usage as shown by Firefox Task Manager for a "static" addon when compared to most other addons in my Firefox. Hope the developer can further optimize it.

I liked using it for awhile, but recently switched to Infinity New Tabs. I found this extension just didn't work more than half of the time and updating icons was just a pain.

Familiar story, I'm afraid......... I'm just expected to know how to use it.......... some innate instinct is supposed to kick-in, perhaps??? It didn't.........
Some instructions would be nice, if you're going make an extension, then do it properly.......... The fact that this kind of slack, half-arsed way of going about things, is so common within the industry shouldn't be seen as making it acceptable........... it isn't!
You often get written + pictorial instructions for how to negotiate a can of pop....... which I only mention to provide some perspective....

I've missed this tab tool for the longest time. I was getting "that weird error" message, and decided to create a new profile and now it works again. I can finally remove "the other one" I was using as it lacked in a lot of functionality. Then I re-sync'd my account, and back to almost normal, just have to fix a few things. But I'm so glad it's working again.

I really appreciate the time you took to make this

Great. would be better if folder is allowed

I've recently upgraded from FF57 to Quantum (since the add-ons' Big Glitch) and New Tab Tools is a great replacement to SuperStart on which I relied on heavily.

In future developments however, would it be possible to group several tiles in one "file", as well as have the option of a "blank tile" that one could use as a separator between tiles.

Finally, useful tip for the dummies like me: If you want New Tab Tools as your Homepage, just drag the add-on icon in the address bar over the Homepage icon... et voilà!

Thanks again and keep up the good work!

"Refresh Firefox" destroys this add on. It was great for me, and I use it every day. Now I have not been able to restore it to my set up or to get it to function. I don't get why Mozilla is so HOSTILE to its users. Mozilla eats the CPU like mad; try to fix it? You get your best add-ons destroyed. This add-ons features should be integrated into Firefox anyway. Why would you not want your dozen or so most frequently used websites easily available? Stupid Mozilla.