Rated 5 out of 5 stars

It's ok. Do u mean here https://bitbucket.org/ashemetov/selectionsk/issues

This review is for a previous version of the add-on (0.5). 

Yes, please.

Rated 5 out of 5 stars

hello. can the highlight function keeps the words which I highlighted after firefox being closed. I mean when I open firefox next time the color is still there? Or do u know any addon can have this function. Thank u !

This review is for a previous version of the add-on (0.5). 

Should be possible, though I'd like to clarify the use case.
Let's move the discussion onto support site, if you don't mind.

Rated 5 out of 5 stars

amazing,wait for chrome version

This review is for a previous version of the add-on (0.4). 

Rated 5 out of 5 stars

really great add on. I wonder if there will be this one for other browsers like chrome or opera

This review is for a previous version of the add-on (0.4). 

I am thinking to port it to Chome. There are no plans to implement the same addon for Opera due to low popularity of Opera.