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Similar extensions say they can't load a local page as a new tab. This add-on shows otherwise. Online or offline, this addon loads its customizable page flawlessly.

Does nothing in Firefox Mobile.

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.