Good, but... Rated 3 out of 5 stars

It's a great extension offering needed functionality in Firefox. But examining bookmarks file it adds 60 characters average per "affected" bookmark...

If you have megabytes of bookmark file with many bookmarks and try to set "permissions" for the most as you access them, your bookmarks file will BLOAT doubling in size...

Instead of writing "bookperm images=false metaredirects=true plugins=false javascript=true subframes=false" in bookmarks file, "bookperm=01010" in binary or "bookperm=10" in decimal (common coding shortcut) can be used instead...

Stating above is merely a suggestion, I think some consideration should be given minimizing impact on size of bookmarks file....

This review is for a previous version of the add-on (08.05.19.02).