I honestly don't know why everyone is giving 5 star reviews. First, in the description of this extension, the word Firefox is used 3 times (one of which is in combination with the word 'bug') and the word Chrome is used 8 times.
I have Inifinity tab installed in Brave Browser. I backupped the data from the extension in Brave Browser. I want to restore that backup into Infinity new tab for Firefox and low and behold: that is not possible. Or at least: I have not yet discovered an obvious way to do this. If it is possible, please enlighten me.
On Firefox the extension is called Infinity new tab (Pro); in the Chrome store it is called just Infinity new tab (not Pro). Why not have that same version available for Firefox?
Also, I don't want to create accounts for simple itty-bitty things like creating a local backup; that's rediculous. Everyone else may be giving away their data and usage to companies like Infinity for free. I am certainly not going to.
All in all: Infinity tab on Chrome/Brave is great! On Firefox: not so much.

Very poor customer service - I emailed for some support and received a three word reply two weeks later.

滚动几页后就滚不动了，点下面的点才可以切换页面

I don't link other accounts to log into any app. If Infinity New Tab would allow me to register to their site with a unique id/password I would try it. Any plans to change this?

Has log in and sync issues with Firefox Q. 67.0.4 (64-bit). Once logged in it does retain SYNC. I have emailed the developer a few times. No responses to date...

It doesn't show me the G-mail notification!!!!!!!!!! Although I turned-on "Show number of unread emails from G-mail on the icon" button.

I tested it and it is cool. But ive read the Privacy Policy on their site. It basicly uses and stores all your data and sells it. There should be info about that directly on the store page. So basicly you are giving a company from China all your passwords, browser history, files and unlimited access for it to save stuff on your computer.

Нельзя создать структуру закладок из закладок самого Firefox

Very annoying that there's no simple alternatives to google or facebook when you want to login.
Can't use a safe basic mail instead
The plugin is useful tho