ZTint by Warewolf Technologies
Colours each Zimbra message row to match its tag, so you spot important mail by scanning instead of reading every tag label. Works in both clients, on whatever host your Zimbra runs on. No tracking, no accounts, no servers.
Available on Firefox for Android™Available on Firefox for Android™
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About this extension
ZTint gives every tagged message in Zimbra a soft wash of its tag's colour, so
you can pick out what matters while scanning the list instead of reading each
tag.
It works in both Zimbra clients — the modern client and the classic ZCS one —
and adapts to whichever one you are looking at.
WORKS WITH YOUR ZIMBRA, WHEREVER IT IS
Zimbra is self-hosted, so there is no single address ZTint could ship knowing.
It installs with no site access at all and asks for nothing up front. Open your
Zimbra client, open ZTint, and click "Use this site" — it checks the tab first
and tells you whether a Zimbra client is really there before you grant anything.
If you would rather not think about it, switch on "Find Zimbra on any site".
ZTint then recognises clients by itself and remembers each one it finds. On a
page with no Zimbra client it does nothing at all.
TUNE IT TO YOUR TASTE
TAG FROM THE KEYBOARD
Classic Zimbra has always had two tagging keys, T and U. The modern client
dropped them; ZTint brings them back. Point at a message and press T to open
Zimbra's Tag dialog for it, or U to remove its tags. Two more are new to both
clients: Y tags a message with your first tag, and each further press moves it
on to the next, while 1 to 9 give it your first nine tags, one each, on top of
the tags it has - press a tag's number again to take just that one off. In the
modern client they act on the message you point at, in the classic client on
the one you have selected, just as classic's own T and U work. With a tag
dialog open, in either client, the keys 1 to 9 pick tags there and Enter saves
them. All of it uses Zimbra's own Tag controls, exactly as the mouse would, and
stays out of the way while you type and of Zimbra's own shortcuts. The keys can
be switched off in the popup.
BUILT TO STAY OUT OF THE WAY
Tagged rows are tinted; everything else is left exactly as Zimbra drew it. The
selected row keeps Zimbra's own highlight so it stays unambiguous, and the tint
is mixed against the page background rather than a hard-coded white, so it stays
correct in dark mode.
PRIVACY
ZTint collects nothing and sends nothing anywhere. It makes no network requests
of any kind, has no analytics, no accounts and no advertising. Your settings and
your site list are stored locally in your own browser and never leave the
device — the extension does not even use browser sync.
It reads the message list to work out what colour each row should be and,
while its keys are on, watches for T, U, Y and the number keys while you point
at a message, for Y and the number keys while a message is selected in the
classic client, and for the number keys and Enter in an open tag dialog.
Nothing you type is recorded. It does not read message bodies, attachments, contacts, calendars or
credentials, and the only change it ever makes to mail is to a message's tags,
when you press one of its keys.
Privacy policy: https://warewolftech.com/ztint/privacy
Published by Warewolf Technologies. Questions: hello@warewolftech.com
Zimbra is a trademark of its respective owner. ZTint is an independent extension
and is not affiliated with, endorsed by, or sponsored by that owner.
you can pick out what matters while scanning the list instead of reading each
tag.
It works in both Zimbra clients — the modern client and the classic ZCS one —
and adapts to whichever one you are looking at.
WORKS WITH YOUR ZIMBRA, WHEREVER IT IS
Zimbra is self-hosted, so there is no single address ZTint could ship knowing.
It installs with no site access at all and asks for nothing up front. Open your
Zimbra client, open ZTint, and click "Use this site" — it checks the tab first
and tells you whether a Zimbra client is really there before you grant anything.
If you would rather not think about it, switch on "Find Zimbra on any site".
ZTint then recognises clients by itself and remembers each one it finds. On a
page with no Zimbra client it does nothing at all.
TUNE IT TO YOUR TASTE
- Tint strength, so the colour is as bold or as subtle as you want
- A separate strength for the row you are hovering over
- Leave messages with several tags untinted, if mixed colours are distracting
- A live preview, so you can see a change before you commit to it
- An on/off switch, with the toolbar icon showing "off" while it is disabled
TAG FROM THE KEYBOARD
Classic Zimbra has always had two tagging keys, T and U. The modern client
dropped them; ZTint brings them back. Point at a message and press T to open
Zimbra's Tag dialog for it, or U to remove its tags. Two more are new to both
clients: Y tags a message with your first tag, and each further press moves it
on to the next, while 1 to 9 give it your first nine tags, one each, on top of
the tags it has - press a tag's number again to take just that one off. In the
modern client they act on the message you point at, in the classic client on
the one you have selected, just as classic's own T and U work. With a tag
dialog open, in either client, the keys 1 to 9 pick tags there and Enter saves
them. All of it uses Zimbra's own Tag controls, exactly as the mouse would, and
stays out of the way while you type and of Zimbra's own shortcuts. The keys can
be switched off in the popup.
BUILT TO STAY OUT OF THE WAY
Tagged rows are tinted; everything else is left exactly as Zimbra drew it. The
selected row keeps Zimbra's own highlight so it stays unambiguous, and the tint
is mixed against the page background rather than a hard-coded white, so it stays
correct in dark mode.
PRIVACY
ZTint collects nothing and sends nothing anywhere. It makes no network requests
of any kind, has no analytics, no accounts and no advertising. Your settings and
your site list are stored locally in your own browser and never leave the
device — the extension does not even use browser sync.
It reads the message list to work out what colour each row should be and,
while its keys are on, watches for T, U, Y and the number keys while you point
at a message, for Y and the number keys while a message is selected in the
classic client, and for the number keys and Enter in an open tag dialog.
Nothing you type is recorded. It does not read message bodies, attachments, contacts, calendars or
credentials, and the only change it ever makes to mail is to a message's tags,
when you press one of its keys.
Privacy policy: https://warewolftech.com/ztint/privacy
Published by Warewolf Technologies. Questions: hello@warewolftech.com
Zimbra is a trademark of its respective owner. ZTint is an independent extension
and is not affiliated with, endorsed by, or sponsored by that owner.
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More information
- Add-on Links
- Version
- 1.2.0
- Size
- 51.4 KB
- Last updated
- 2 days ago (Sep 26, 2026)
- Related Categories
- License
- All Rights Reserved
- Version History
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