Came across this add-on and have used it very successfully to take notes and add notes of URLs etc.
Have to be careful when doing a cache clean tho' as notes are lost in the cleanup, and so far haven't found out how or where the notes are being saved when using Export as HML as am not very techie and not sure where "Export as HTML" is being exported to.
But, anyhow, really enjoy using this add on and find it really helpful.