Did you install the version for TB?

https://addons.mozilla.org/en-US/firefox/addon/theme-font-size-changer-for-tb/versions/

To install, drag the green Download Now button and drop it onto Tools/Add-ons/Extensions in TB.

Lots of threads on Theme and Font changer today. Not sure if compatibility issue or what. The add-on states it works up to version 59.

The add-on is indeed not working in TB 52.5.2, but if you're willing to follow the instructions here, that will serve as a stopgap (same solution for Firefox and TB) until the add-on is fixed.

sfhowes said

Did you install the version for TB? https://addons.mozilla.org/en-US/firefox/addon/theme-font-size-changer-for-tb/versions/ To install, drag the green Download Now button and drop it onto Tools/Add-ons/Extensions in TB.

That does not work. Shows it could not be installed because it appears to be corrupt.

That does not work. Shows it could not be installed because it appears to be corrupt.

sfhowes said

Did you install the version for TB? https://addons.mozilla.org/en-US/firefox/addon/theme-font-size-changer-for-tb/versions/ To install, drag the green Download Now button and drop it onto Tools/Add-ons/Extensions in TB.

There is NO green Download Now button.

Airmail said

Lots of threads on Theme and Font changer today. Not sure if compatibility issue or what. The add-on states it works up to version 59.

Stopped working Jan 5, 2018 AM PT.

Stopped working Jan 5, 2018 AM PT.

Barns said

sfhowes said

Did you install the version for TB? https://addons.mozilla.org/en-US/firefox/addon/theme-font-size-changer-for-tb/versions/ To install, drag the green Download Now button and drop it onto Tools/Add-ons/Extensions in TB.

There is no green DOWNLOAD NOW button.

Regarding DL button, I think the site is a little wonky for add-ons that work for both firefox and Thunderbird.

For Thunderbird use https://addons.mozilla.org/en-US/thunderbird/addon/theme-font-size-changer-for-tb/

Those of you that are unhappy about the expiration of the addon should email [email protected] to contact the "Support Email" for https://addons.mozilla.org/en-US/thunderbird/addon/theme-font-size-changer-for-tb/

Wayne Mery said

Regarding DL button, I think the site is a little wonky for add-ons that work for both firefox and Thunderbird. For Thunderbird use https://addons.mozilla.org/en-US/thunderbird/addon/theme-font-size-changer-for-tb/

Sorry. Still no joy....

Sorry. Still no joy....

It doesn't much matter whether you see a DL link on https://addons.mozilla.org/en-US/thunderbird/addon/theme-font-size-changer-for-tb/ or not - what's there isn't useful until the author puts up a new version. And Thunderbird will notify you when it's there anyway, so DL link isn't absolutely necessary.

Wayne Mery said

It doesn't much matter whether you see a DL link on https://addons.mozilla.org/en-US/thunderbird/addon/theme-font-size-changer-for-tb/ or not - what's there isn't useful until the author puts up a new version. And Thunderbird will notify you when it's there anyway, so DL link isn't absolutely necessary.

So. The bloody thing just expired this morning?

So. The bloody thing just expired this morning?

The workaround suggested by mrx2020 is tested and working here in TB 52.5.2:

1. Download addon .xpi file (google for instructions) 2. unzip .xpi file (xpi is simply a zip archive) 3. locate file bootstrap.js in the archive, open in text editor 4. look for the code like this: compile:function(){ if((build+).length != 10) Services.prompt.alert(null, 'CompileAddon', 'An error occured'); if(new Date().getTime() > ((build+).length == 10 ? build*1000 : build)+(3*30*24*60*60*1000)) return false; return true; } 5. Comment out (//) or delete line that begins with "if(new Date().getTime..." 6. Zip the archive back (make sure to zip from inside the xpi directory, so that there is no additional path to files). Rename resulting zip file into something.xpi 7. Manually install the new addon file into Thunderbird

Thank you, "sfhowes" ...

If you need the experts to market ice in the Arctic in the middle of the winter, resolve conflicts at board levels, address corporate governance or regulatory issues, turn out 300 pages on ... you get it, I may be your guy.

Writing, editing code et all, perhaps you are my guy/lady.

Rather drive the thing at 200 mph on a track then even consider figuring out how THAT internal combustion engine "really" works.

Maybe the thing will resolve courtesy of the author.

Hello

On another post about the same problem:

https://support.mozilla.org/en-US/questions/1198320

Zenos gave a solution where you install a folder called "chrome" with a css file in it.

This solution worked for me!