0xml

Oops, updated.

Better if it allowed single-tool installs instead of the whole suite.

Don't have access to read the code, but I think ideally there should be only one instance created at startup, right?

Not exactly - encoding it twice increases by 4/3 * 4/3 - 1 = 7/9, which is about 77.78% more than the original.

Maybe Printable Document Format.

This was my first instinct as well, which makes sure numbers are adjacent. OP also mentioned this variant as lucidBrot/hexgridspiral in the older post.

Firefox expects your script to return undefined, so you can add one at the end (or even shorter: void 0).