i have some sort of hand or joint issue and this is saving my life! though the numbers are sometimes hard to read, i'll have to see if i can change the colors in settings.

OMG! This extension is pure perfection! Any keyboard lover ought to install it stat!

This extension is sooo good, I was looking for something just like that. The only thing I'd wish the developer would add(which I know is a far ask) is a way to set the numeral base in which the number-hints are shown. for example, instead of pressing "25" (base 10 representation) I'd want to press "221" (base 3 representation). The reason I want this is that the comma, period and backslash keys are the most comfortable for my right hand fingers to reach on the keyboard. therefore I mapped fn+, to 1 fn+. to 2 and fn+/ to 0 using karabiner-elements and I wish I could navigate just with those keys.. which I could if there was an option to set the hints in KJ to show in base 3 :)

This works like a charm, it's incredibly useful and simple to use. Thank you very much.

This is perfect. I love it. It makes it so easy to open links quickly with the keyboard. Thank-you!

To be honest: I was a bit skeptical about extension number 309 for handling links with a keyboard. Before Mozilla changed the extension system there was a good one. After that they didn't work (completely), or they were unhandy, or you needed four pages to write down the shortcuts.
This extension is simply fabulous. If you have a page with a lot of links, it doesn't count thousands of links with unhandy long numbers, or complicated combinations. After scrolling this extension simply starts over numbering at the top of the window. A brilliant idea!
I have problems using a mouse, and this extension really helps! Numbers are very clear too.
I have one suggestion. If you have a page with a lot of links, sometimes I want to open a lot of links in new tabs. For example from a search engine. If I now open a link, I have to press the shortcut again every time after opening a link.
It would be handy if there was a setting you only press the shortcut once, and after that pres 1, 2, 3, 4, ... and the links open straight away.
This doesn't happen oft, but I'm really impressed by the simplicity and effectiveness of this extension.