Rated 1 out of 5 stars

per WBT el jun. 22, 2015 ·

See https://addons.mozilla.org/en-US/thunderbird/addon/message-pane-button/ for a more recent add-on offering comparable functionality.

Rated 4 out of 5 stars

per EBV el ago. 11, 2011 ·

I missed the Toggle Preview Pane terribly. I'd didn't know how to "up the maxVersion in the rdf to 6.0.0" as per mod_wastrel's glimmer-of-hope-for-me post. Here's a link to instructions: http://www.techsupportalert.com/content/how-update-firefox-thunderbird-addons-new-release.htm

Toggle Preview Pane is installed now and working just fine.

Rated 5 out of 5 stars

per mod_wastrel el jul. 5, 2011 ·

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).

Rated 5 out of 5 stars

per Spikes el oct. 7, 2008 ·

Small and indispensable