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CloseReview for MR Tech Toggle Preview Pane by mod_wastrel
Rated 5 out of 5 stars
I just upped the maxVersion in the rdf to 6.0.0**. (I also created a new 18x18 button image using the new Fx/Tb "standard"--looks better... one size fits all. :D)
**The simpler way nowadays is to just install Add-on Compatibility Reporter (which, primarily, disables checking for compatibility).
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