Hi David,
I don't think the directory entry should contain the sentence "GNU LibreJS is currently very resource demanding." Because it's ephemeral and unqualified and I couldn't find more information about that statement, even on the project page. In short, the directory is a listing, not a review.
Similarly, this information
The LibreJS project is seeking more _javascript_ programmers to help maintain this browser extension. If you want to help, send an email to <address@hidden>.
shouldn't be in the directory since it should be maintained at the project level.
~ Greg