Yes these cool extensions offer great solution for bloggers by adding several blogging related utilities to Firefox browser integrated in Firefox Browser itself. No need for separate browsers as all solutions would be in the Firefox browser it self.

But before using them you have to download firefox browser and install now.

Extension#1 ScribeFire Blog Publishing Client Tool It adds full featured blog client publishing tool to firefox using which you can write blog posts within Firefox in it’s own WYSWYG editor and publish them to blogs. You can add any no. of blogs and select articles to publish in desired blog. Also supports many blogging scripts including popular Wordpress and also lists all categories. You can choose to post to any of the categories and add categories too. Save posts for future use. No extra software is required as it opens inside firefox browser itself.

Extension#2 How To Know If Comments Of A Blog Are Under DoFollow or NoFollow If you comment in dofollow comment blogs then your URL which u used while commenting gives a natural back link and a +1 Technorati authority. Use a lightweight extension NoDOFollow or a all in one SEO extension SEO For Firefox and these would highlight nofollow links in blogs/sites in some select color.

Extension#3 SEO For Firefox All in one SEo tool integrated to firefox shows you pagerank@Google, traffic rank@Alexa, backlinks from many search engines, bookmarking sites, .edu links etc and all SEO information for your blog and other stuffs related to search engines. Also identifies nofollow comments in blogs.

Extension#4 ColorZilla Know the exact color (color codes) of any part of any page (your blog) or anything in Firefox browser and blend adsense and other ads into your blog’s/site’s theme color using it (as you know exact codes of color used in your blog’s theme) and increase clicks.

Extension#5 If you know about it. Please post a link in the comment. Coming Soon