Do you have the latest version of the 'fixed' add-on?

https://addons.thunderbird.net/en-us/thunderbird/addon/theme-font-size-changer-fixed/

https://support.mozilla.org/en-US/kb/installing-addon-thunderbird

That worked! (The one I tried earlier didn't.) Thank you very much for taking the time to help me out (and others with the same problem I am sure!).

21DEC18 I just did a Security Update (60.3.3 (64-bit) ) and suddenly the font size in the menus, like the email index list, are miniscule. Long Long Ago I did _something_ to make the font larger. What was it?

Theme & Font Size Changer is not listed as being incompatible, but I see a lot of others are.

I wish it would tell you what was going to be disabled, BEFORE actually making the update & fucking me over.

How do I revert -- to where I was, not to "default" state?

OK so where the hell IS it? No icon, no listing in the Tools or Dropdown menus. Where are the CONTROLS ???

All I can get into is Preferences which does not allow me to USE the addon !!!

DAMMIT I"M TRYING TO DO WORK ON MY COMPUTER NOT FIX LOUSY UPDATES

Theme Font & Size Changer for Thunderbird 64.6

Fixed version (no 90 day timer till silent failure) of the popular "Theme Font & Size Changer for Thunderbird" addonIMPORTANT NOTE: This addon is compatible with TB58+ as of version 64.4

Also, this addon is compatible with e.g. TB 52 ESR and other versions up to TB57 - use version 64.3 from the archive. It is beyond me why this addon shows as incompatible with TB52 ESR when there is clearly one version available!

Also now missing the ZOOM button that allows me to increase the font size of received emails SO I CAN ACTUALLY READ THEM WITHOUT HOLDING A MAGNIFYING GLASS IN MY HAND

Select Tools/Add-on Options/TF&SC, uncheck all 3 boxes in the Preferences tab, then access TF&SC under Tools in the main window or the button on the Mail Toolbar.

Heres the deal. The developers need to allow a user to designate an AddOn as being "required for accessability" and make sure that no update is performed before warning the user that such AddOns would be disabled, and requiring permission to do so.

sfhowes said

Select Tools/Add-on Options/TF&SC, uncheck all 3 boxes in the Preferences tab, then access TF&SC under Tools in the main window or the button on the Mail Toolbar.

That is their defualt state.

But restarting TB made it appear.

AddOn info needs to tell the user WHERE the control will be found -- some are in a Toolbar (but which?), some only in the "three horizontal bars" icon, some are in a main window dropdown. When you install something, you have to go hunting randomly to FIND it !!!

Zoom Button can be installed if you first open Tools/Options/Advanced/General/Config. editor and double-click the preference extensions.strictCompatibility to false, OK to close Options. To install, drag the Download Now button and drop it onto Tools/Add-ons/Extensions in TB. Then, select View/Toolbars/Customize... and drag the Zoom button onto the Mail Toolbar. Tested and working in TB 60.4.

No "Options" under TOOLS. Using OSX.

But I'm familiar with editing config under FireFox.

Its already installed, but the update disabled it. Will I have to re-install or just re-enable?

So how else do I open config in TB?

Look under Preferences/Advanced/General, or AppMenu/Options/Options/Advanced/General.

You may have to restart TB after the add-on is enabled.

/Advanced/Advanced gearwheel, then in lower right corner.

Yea, works after a Restart. thanks, now I can put away the magnifying glass...

VerizonSucks said

/Advanced/Advanced gearwheel, then in lower right corner. Yea, works after a Restart. thanks, now I can put away the magnifying glass...

This is really the only beef I have with Thunderbird. It should be an option to change font size in the program itself.

THANK YOU to those who took the time to help us fix this.