Rated 4 out of 5 stars

thanks, works nice.
but i want to ask, what if i want to redirect: .../soft_blue/1.html to .../Soft_Blue/1.html
and it is case sensitive. what expression should i use. sorry, noobs here.

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

Hi. Sorry, but you cannot redirect to the same url with different casing. The regexes are not case sensitive, so it would always match the destination url as well. You could hack around it maybe by doing:

Include pattern: ../soft_blue/1.html
Exclude pattern: ../Soft_Blue/1.html?fakeparameter
Redirect to: ../Soft_Blue/1.html?fakeparameter

If the website doesn't mind a fake querystring you can use that to distinguish between the two urls, and use the exclude pattern to make sure the second one doesn't get redirected again.