Rated 3 out of 5 stars

Doesn't work with v60+.

But this worked manually (no extension):-

http://codeverge.com/mozilla.support.thunderbird/change-application-font/1518119

Rated 1 out of 5 stars

IT DOESN'T WORK! No buttons, nothing in tools.

This user has a previous review of this add-on.

Rated 5 out of 5 stars

60.5.1 32 BIT

THE ACTUAL EMAILS ARE GOOD BECAUSE WE CAN USE THE ZOOM FUNCTION TO MAKE THEM AS BIG AS WE WANT ; THE PROBLEM IS THE FIRST PAGE WHERE THE TEXT WRITING IS TOO SMALL ; IS THERE ANY WAY WE CAN MAKE THE TEXT WHERE THE SUBJECT AND THE SENDER ARE ANY LARGER ?

Rated 1 out of 5 stars

As a new TB user, I am amazed the fonts are tiny and there is no standard tool for increasing their size. Unfortunately, this app doesn't work in Thunderbird 60.4.0. (No buttons appear.)

Rated 1 out of 5 stars

No funciona en Thunderbird 60.3.2

Rated 4 out of 5 stars

Have used this add on for years. Has always worked well. However in Thunderbird 60.3.1 (32 bit) I can't access the settings. No buttons are shown. Hope that this is fixed soon.

Rated 5 out of 5 stars

Thanks for fixing TFSC ("fixed" version) promptly to work with 60.2.1 in mid-October. Thank you for your hard work.

I won't allow TB to "auto upgrade" anytime soon because, for me, the stock TB font size is too small to read. Thanks Bzzz for a great product.

Rated 1 out of 5 stars

Review of my review. Use the fixed version and all is well.

This user has a previous review of this add-on.

Rated 1 out of 5 stars

Add-on has not functioned since TB 52. Button is not in toolbar, option is not in menu. Developer is unresponsive to contacts. It's a shame, because when it worked, it was wonderful. This feature should be part of TB by default and not forced to be provided by a third party add-on. Instead, Mozilla forces Lightning on us.

Rated 1 out of 5 stars

Complete failure in Thunderbird 60.3. It cannot be accessed after installation.

Rated 1 out of 5 stars

I am sorry , but there is definitely no button to access this add-on.

Rated 1 out of 5 stars

Theme Font & Size Changer for ThunderBird 64.1
not showing anywhere in
Thunderbird with Version 60.0

How could I use it?

This user has a previous review of this add-on.

Rated 3 out of 5 stars

I can increase the font size, but not the line spacing so the lines are jammed in close together. Now I can't simply type in an email address to auto complete. Am I doing something wrong?

Rated 2 out of 5 stars

I'm not sure how to rate this add-on.
It used to work and was great, but now that I have re-installed Thunderbird I can't use it as an extension anymore. It simply won't show up next to the menu.

Rated 5 out of 5 stars

Thank you so much Steve for the clear explanations and the procedure to keep enjoying this great add-on for people like me using various screen sizes and devices. I get the right font size in two clicks! Too bad Baris Derin did not bother to make the adjustment himself, he is still to be commended for offering this great feature to the community.

Rated 5 out of 5 stars

I'm disappointed by seeing people giving so many one-star reviews for something that is so easily fixed. We should be congratulating the author for this great plugin, without which TB would be completely unusable for many of us. Please use this workaround for the date checking issue rather than forking the add-on.

Here is how to fix the date check issue in the official release:
- download the "xpi" file for the latest TFSC release.
- change the file suffix from xpi to zip
- unpack the zip file into a work directory
- in your work directory there will be a file called "bootstrap.js". In that file, search for a function called "compile:function()". Comment out the line that begins with "if(new Date().getTime()".
- Save your changed bootstrap.js
- zip the contents of your work directory into a new .zip file. Note that you need to zip the contents of the work directory, not the directory itself.
- change the suffix of your new zip file to xpi.
- install your xpi file as a thunderbird add-on.
- set automatic updates to off for your new version

This user has a previous review of this add-on.

Rated 1 out of 5 stars

Type "Theme Font" into the search box and choose the 3rd one: Theme Font & Size Changer (fixed) by Bzzz. It's the same AddOn but without the 90-day kill switch code.

Rated 2 out of 5 stars

That's all I have to say.

Rated 1 out of 5 stars

it sucks w/o TF. Baris Derin is silent.

Rated 3 out of 5 stars

Great addon except when it expires every 90 days and fix is not implemented right away. Tiny font is tough on my eyes and sanity!

Found a fix by another user that works and does not expire. check out wanhunglo dot com for their post about this addon and their fix for it. works for me on both mac and windows.