how to fix it Rated 5 out of 5 stars

the linke posted did not work for me but this one has a thread on how to fix it and albeit not easy peasy it worked for me.

http://forums.mozillazine.org/viewtopic.php?f=48&t=1520265&start=1755

The best Thunderbird theme...but v52 compatibility, please Rated 5 out of 5 stars

Silvermel current version (v2.0.1) isn't compatible with Thunderbird 52.*
You can edit the extension to use it in v52 and looks like Silvermel works fine.
Instructions: http://forums.mozillazine.org/viewtopic.php?f=48&t=1520265&sid=31621ec02c683ac9d464d5b1e9f26774&start=1755

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

Good Rated 4 out of 5 stars

It gives a great look to Thunderbird. Hope you will make even better the next time.

eXcellent!! Rated 5 out of 5 stars

Silvermel is back - thank you!!

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

So glad to see an update! Rated 5 out of 5 stars

Thank you to the developer for the recent update! I know FF has been outpacing most app developers. I simply LOVE Silvermel for both FF and TB. Again, thank you!!!

This review is for a previous version of the add-on (2.0.0). 

Yeeees New Update Rated 5 out of 5 stars

Thank You !

This review is for a previous version of the add-on (2.0.0). 

Wouldn't use thunderbird if not for this addon Rated 5 out of 5 stars

Thanks the author, vger42, anonymous for sharing info on latest version. I wouldn't use thunderbird w/o this addon.

This review is for a previous version of the add-on (1.6.1). 

Works with Thunderbird 45.2.0 Rated 5 out of 5 stars

Very good hint from vger42.
One of the few good themes that are still functioning currently. Good job ShareBird!

This review is for a previous version of the add-on (1.6.1). 

There are still Updates! Rated 4 out of 5 stars

Hello Guys,
the developer is still active, just look at the forum: http://forums.mozillazine.org/viewtopic.php?f=48&t=1520265&start=1665

View the post:
8<
New Versions:

Charamel:
http://www.silvermel.net/dev/xpi/charam ... _r6860.xpi

Silvermel:
http://www.silvermel.net/dev/xpi/silver ... _r6860.xpi
>8

Cya

This review is for a previous version of the add-on (1.6.1). 

Sadly lost its former glory Rated 1 out of 5 stars

A brilliant theme which for years was hugely popular and completely outclassed the default theme. You only have to look at the forums to see how popular this theme was and how much people want to update it. Sadly the developer no longer has time, therefore in the interests of the open source community this should be made open source so others can work on it. I doubt many people will be buying him a beer if he's too busy. One star as it's no longer compatible with current versions

This review is for a previous version of the add-on (1.6.1).  This user has 2 previous reviews of this add-on.

Contribution??? Rated 1 out of 5 stars

How can you ask for a contribution?
You never update the program.

This review is for a previous version of the add-on (1.6.1). 

fix for the compose message Rated 5 out of 5 stars

use addon Color Text Compose Buttons

This review is for a previous version of the add-on (1.6.1). 

Had to change (both) install.rfd to make compatible to TB 45 Rated 3 out of 5 stars

But still works then.

Edit:

nope, it's possible to enable it now, but in the compose message window it's obvious that it's not compatible any more:
https://i.imgur.com/9u19tn4.jpg

Please update.

This review is for a previous version of the add-on (1.6.1).  This user has a previous review of this add-on.

Awesome Rated 5 out of 5 stars

Good job looks fantastic in Mageia linux with firefox 38 esr.

This review is for a previous version of the add-on (1.6.1). 

10x Rated 5 out of 5 stars

Looks really nice !!! thanks
can you build it some dark themes like Silvermel?
thanks for sharing !!!!

This review is for a previous version of the add-on (1.6.1). 

Very nice! Rated 5 out of 5 stars

Looks really nice on Windows 10.

Try it with the following:

Theme Font & Size Changer extension using "Adobe Gothic Std B" 14.

This review is for a previous version of the add-on (1.6.1). 

Not so good on Windows 10 Rated 5 out of 5 stars

Not really working correctly on Windows 10 and Firefox 40. The title bar is not fully skinned and doesn't look all that great. Otherwise one of my all time favorite themes.

This review is for a previous version of the add-on (1.6.1). 

MY FAULT Rated 5 out of 5 stars

MY FAULT
i posted recent review saying was not running on fff 38
wrong it is
sorry about that
has been a favorite theme for years
great theme

This review is for a previous version of the add-on (1.6.1).  This user has a previous review of this add-on.

Silvermel 1.6.1 Rated 5 out of 5 stars

Untested for now. Silvermel 1.6.1. is available if you click on Version Information and See complete version history.

Now compatible with Firefox 36.0 - 41.0a1 and Thunderbird 31.0 - 41.0a1.

This review is for a previous version of the add-on (1.5.7.1-signed).  This user has 14 previous reviews of this add-on.

Silvermel - Work in Progress... Rated 5 out of 5 stars

Thank you ShareBird! That was certainly easier than trying to follow highwaykind's instructions.

This review is for a previous version of the add-on (1.5.7.1-signed).  This user has a previous review of this add-on.

Development Versions

Just realize that these versions have much more work on them than highwaykind modifications. Those modifications just allow that the theme can be installed, but don't actually make it "work" properly... ;-)