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Rated 5 out of 5 stars
i was just writing an involved php page.
it was not 'showing' anything in browser.
i was going crazy looking a 'code' trying to figure out why,. looked at 'page source' and all the text seemed to be there. tried forcing 'black' text to see if it had changed to white, even. Nope.
then I remembered installing this addon.
3, 4, 5 seconds... So obvious. I was missing a lessthan "<" on the freaking close title..
Rated 4 out of 5 stars
well written and easy to see the hierarchy or structure of a complex page..
large stylesheets appear, well cluttered though.