Note: My Web pages are best viewed with style sheets enabled.
I modified the Theme Font & Size Changer 50.0 extension on the addons.mozilla.org site to eliminate automatic expiration. The extension's developer claims that a GPL 3.0 license controls the rights to this extension; and I attempted to comply with the terms of that license, especially §5 ("Conveying Modified Source Versions"); since the .xpi file is the only source with which I worked, I do not feel §6 ("Conveying Non-Source Forms") applies.
I successfully tested the modified version in SeaMonkey 2.46 and Thunderbird 45.6.0 to the extent of installing it and using it. I make no warranty that it is error-free.
This is effectively an unsigned version and thus cannot be installed for Firefox. Thus, the "fx" has been removed from the .xpi file-name. When Mozilla finally mandates only WebExtensions to the exclusion of prior extensions, I have no plans to create a new WebExtension version. Before that dreaded time, I will update this only when needed for compatibility or new features in the expiring version.
The modified version will be identified in the Addons Manager as Theme Font & Size Changer noexpire 50.0.
Get It Here
4 January 2017
David Ross home