From Ecstatic to Disappointed Rated 1 out of 5 stars

I've relied on Lightning for many years, since it gave me an alternative to Outlook when added to Thunderbird, and I no longer had to parallel my email gathering and calendar maintenance between Seamonkey or the two-window Thunderbird/Sunbird combo (and still have to use Outlook for some endeavours).

With today's update of both Thunderbird and Lightning, that ease (and trust) ended, since Lightning only gives me a grid. Worse, in going back (yes, that's how important my calendar is) to the previous versions of the client and calendar (where both worked together), Lightning does nothing. It won't load. Its button has disappeared, as has its integration into Thunderbird ("settings" gives me only the client's settings, with no Lightning options).

Now I'm left wondering if my calendar database(s) are okay and still usable, should I manager to get a working version of Lightning installed. I may very well go back to paper for time management. It may be old tech, but it has proved consistent and reliable.

This is not a bug report. This is a review of the latest iteration of the extension as I've experienced it. Since I use the app for time management, there is a high lever of trust that it will be there, functional and unglitched.

That trust was broken today. (Even worse, reviews of the newest version posted here were met with admonishments that they were glitch reports. The disappointed user shouldn't be made to feel guilty for posting a bad review of something that doesn't work, based on their honest experience.)

Yeah: Really not happy.

This review is for a previous version of the add-on (4.7). 

Thanks, this is the kind of review I can understand. What I was trying to say in previous answers is that I believe this isn't at all an issue with Lightning itself, but rather with the Thunderbird update process, and also something that can easily be remedied through support. As you can see, others have posted that the update worked for them without any problems at all.

I am certain your calendar database is still intact and I am sorry the update process is such a pain for you, I am glad we only do major updates every 42 weeks now. Just imagine this kind of thing happening every 6 weeks following the Firefox cycle.

When using Thunderbird 38, make sure you are using Lightning 4.0.x, when using Thunderbird 45 make sure you are using Lightning 4.7. That's about all I can say here, I am happy to help further in the support section.

funktioniert Rated 5 out of 5 stars

nach Update auf TB45 musste Lightning neu installiert werden
Funktioniert einwandfrei.

This review is for a previous version of the add-on (4.7). 

calendar is lost ! Rated 1 out of 5 stars

after having upgraded to TB-45, calendar and tasks are no more visible ; neither in preferences.

What is wrong in the profile, knowing that on the same computer, i have created a new profile where calendar and tasks are OK ?
Thanks !

This review is for a previous version of the add-on (4.7). 

Please check with support for this issue, or try re-installing Lightning from this site.

Dumb Thunderbird Update - Part 2 Rated 3 out of 5 stars

The developers reply to "Dumb Thunderbird Update" is, at best, not accurate as of 4-25-16. Thunderbird updated via the automated update apparently does not come with an updated version of Lightning. Nor does the lightning update from here function (it's not allowed - not signed). In order to get a copy of Lightning that functions with Thunderbird 45.0 you apparently have to download the Thunderbird installer and reinstall Thunderbird. IMHO, just plain sloppy!

Update: It is possible that today I did get confused by the similarity in appearance between the add-on pages for Firefox and Thunderbird and attempted to install Lightning in Fiirefox as a response from the developer suggested. But the bottom line still is that it appears automatic updates to Thunderbird are resulting in Lightning disappearing until one or the other is reinstalled. I'm apparently not the only one seeing this phenomenon judging from the reviews I'm seeing. Nor is this the first time Lightning has disappeared on me.

FTR: Ligtning would get a considerably better rating from me if it weren't periodically disappearing.

This review is for a previous version of the add-on (4.7). 

If you are getting a message that the Lightning update is not allowed because it isn't signed, then you are likely attempting to install Lightning into Firefox. Thunderbird does not require extension signing.

I've checked the Thunderbird update files and they contain Lightning, so it must be something else. I would love to help and fix any potential issues, but I really don't want to spark any discussion here as the reviews are not meant for support issues nor bug reports.

Dumb Thunderbird Update Rated 1 out of 5 stars

Cannot believe an update to Thunderbird is released that doesn't also include a compatible calendar update!! What planet are these people on?

This review is for a previous version of the add-on (4.7). 

Smart Thunderbird Update

Luckily, a compatible Lightning version is actually shipped with Thunderbird and therefore there should be no compatibility issues at all. Anyway, if you need to reinstall, you can now get the latest version also from

Does not work with v45 Rated 2 out of 5 stars

Thunder has been updated to v45 and lightning does not work with latest version: I cannot use my calendar-agenda. I hope a new version of lightning would be ready asap...

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

What happened to Lightning? Help! Rated 1 out of 5 stars

I updated Thunderbird a day or so ago, and now my Lightning Calendar(which is critical to my life) is gone! And there is no new version that will work with T-Bird?? Please help! I seriously and screwed without my calendar!! Whats going on???

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

Multi-Month View Rated 5 out of 5 stars

I want multi-month view, just shows current and next month.
Or, single-month view with comming one or two weeks.
No major calendar apps have such view... :-(

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

Theoretisch ganz gut, hätte es nicht dieses üble Verhalten Erinnerungen zu verlieren Rated 2 out of 5 stars

Was soll ich sagen... die Extension ist ja ganz gut an sich... nur was nutzt das wenn es Erinnerungen verliert? Zum Glück verliert es keine Termine aber das Erinnerungsfenster enthält nicht mehr alle Termine wenn man TB neu startet. Was vielleicht ok wäre wenn es Duplikate wären, obwohl ich auch das nicht haben wöllte, aber es fehlen auch ganz normale Erinnerungen. Termine mit den gleichen Einstellen sind weg, andere sind noch da. Das ist total unbrauchbar damit. Ein Termin bzw seine Erinnerung darf erst verschwinden wenn man ihn erledigt hat. Lightning sollte nicht einfach für mich entscheiden.

Damit hat die Extension einen üblen Nachteil gegenüber anderen Kalenderverwaltungen.

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

Lightning gefällt mir, wenn da nicht... Rated 3 out of 5 stars

Seit einiger Zeit habe ich Lightning in meinem Linux-Thunderbird installiert. Es erinnert mich an meine Termine und /oder Aufgaben. Aber es ist nicht möglich diese Termine und Aufgaben im Überblick anzusehen. Das war bei meinem TheBat! besser.
Aber hier kann man einstellen, was man will - es geht nicht.
Wirksamen Support gibt es auch nicht außer diesem thunderbird-mail-Forum, wo mein Thread aber immer gelöscht wurde (kaputt?!)
Kennt jemand ein besseres Forum - auch in englischer Sprache kein Problem.

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

Eigentlich ist Lightning eine gute Sache Rated 3 out of 5 stars

Es gliedert sich gut in Thunderbird ein und ist meiner Meinung nach gut zu bedienen.
Was nervt sind die Fehler wie "Erinnerungen schließen" oder dass Passwörter vom Kalender nicht gespeichert werden. Letzteres hat mich auch zum Downgrade auf Version bewegt. Mit der gibt es keine Probleme beim Syncen der Kalender.
Das tagelange Termine nicht in einem Balken angezeigt werden, ist auch nicht verständlich. Ansonsten eine feine Sache.

EDIT: Passwörter der Kalender werden nicht gespeichert, Weder in Version noch in 4.0.6.
OS: Ubuntu Mate 15.04

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

Super Rated 5 out of 5 stars

Very nice addon it makes alert

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

good Rated 5 out of 5 stars

Good app

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

Task share Rated 1 out of 5 stars

I cannot share / send tasks. Why???

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

Lightning is great - when it works Rated 3 out of 5 stars

A couple of months ago, Lightning diappeared and nothing I could do would bring it back. Eventually, after about a week, it did come back and all my calendar entries were intact.

Lightning has disappeared again and has already been gone for longer this time.

While I like Lightning very much - if I can't rely on it for reminders then it is useless to me.

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

Kein Lightning mehr nach Update Rated 4 out of 5 stars

Um den Fehler zu beheben muss man die xpi Datei in zip umbenennen, die install.rdf mit einem Editor bearbeiten und die maxVersion auf 40.* ändern. Dann geht es wieder. Ein Update der Erweiterung würde die Sache natürlich vereinfachen ;)...

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

Oder sogesehen ein downgrade. Lightning für die veraltete Version Thunderbird 40 gibt es unter

Weitere info hier:

Kein Zugriff mehr auf Termine Rated 1 out of 5 stars

Lightning war für mich jahrelang ein wichtiger Bestandteil von Thunderbird. Nach dem letzten update steht kein funktionierendes Ligntning als add-on zur Verfügung. Alle meine Termine sind außer Kontrolle. Gibt es eine Möglichkeit, wenn auch auf Umwegen, die Kalenderdatei lesbar zu machen?
Auf jeden Fall werde ich mich von Thunderbird verabschieden.

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

Not happy Rated 1 out of 5 stars

You can call it a bug if you like, but the calendar just disappeared and despite some helpful responses to queries, simply will not come back. I've lost all my calendar dates and records so, as far as I'm concerned, Lightning is a failure.

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

Love It, But will Always miss Mozilla Sunbird Rated 5 out of 5 stars

I love lighting, but I will always miss Sunbird and it's icon!

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

Katastrophe seit einigen Wochen Rated 2 out of 5 stars

Ich nutze Lightning in der neuesten Version mit Thunderbird 38.5.2 und der owncloud 8.2.2 mit ssl.
Bis vor einiger Zeit war ich richtig zufrieden, habe alle meine Kalender mit dem Android Handy und Thunderbird stets aktuell halten können und konnte gut damit arbeiten.
Dann aber, nach irgendeinem Update, funktionierte nichts mehr. Bis ich gemerkt habe, daß Android zwar noch mit owncloud harmonierte, aber lightning überhaupt keine daten mehr versendete oder annahm, hatte ich schon einige fiese, unangenehme Begebenheiten/Termine verpasst. Es funktioniert nichts mehr. Mit keinem Setup, mit keiner installation. Für mich ist Thunderbird mit dem Lightning Calendar im Moment überhaupt nicht mehr zu gebracuhen. Einzig 2 Sterne, weil es Jahrelang gut geklappt hat.

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