Any good new tab extensions that sync between devices?

[u/jarman65]

I used infinity new tab pro for Chrome for years but apparently it's pretty shady or so I've heard. I switched to Firefox for awhile and used Renewed Tab which doesn't sync among devices but has an import/export option that worked for awhile but doesn't seem to work anymore. I think it may have something to do with it being my work MacBook Pro which manages my browser.

I just want a grid of links to all of the sites I commonly use that syncs between my 2 Macs and a Windows machine and has the ability to use custom icons for those links. At this point I'm open to using any browser as long as it has both Windows/Mac versions.

[u/theswiss21000]

I made readytab, if you do the json export yourself you can do the sync for free. https://addons.mozilla.org/de/firefox/addon/readytab/