I am using Firefox 52 ESR. I have been using ReminderFox for a while to remind me of personal events.
While 52 ESR remains supported for several more months, the proverbial handwriting is on the wall. I looked into a ReminderFox replacement.
After the current ESR support expires I could use a third-party Firefox XUL based derivative. I lack faith in those versions, but I might have to use one of them to avoid Firefox add-on misery.
Simple reminders are all I need. ReminderFox works well for me. I miss KAlarm with respect to the mere simplicity. No, I am not going to use the current version or any software infected with Akonadi. I would use the current KAlarm if there was no Akonadi database requirement.
I am not interested in compiling the Trinity version of KAlarm because that means building the entire tdepim package — in addition to other Trinity dependencies.
I do not use a smart phone and have no motivation to use one.
I will not use any Google service or product or anything online “cloud” related.
Something like radicale could provide centralized storage, but support apps to read the data are limited. I already have centralized storage anyway because I configured ReminderFox to store data outside $HOME. That is one of the features I liked about ReminderFox. The developers were not $HOME-centric.
Something like NextCloud might work, providing access to data through Firefox on any computer. Seems like a lot of overhead though and I have no idea how I would receive automatic reminders through Firefox.
Let’s keep this simple.
I use Thunderbird for email. ReminderFox works with Thunderbird. There have been no statements from Thunderbird developers that XUL add-ons will be eliminated any time soon.
The easiest solution is shift to using ReminderFox in Thunderbird. Doable for me although that changes my work flow. I more or less always have Firefox open with any computer I use. ReminderFox fits my work flow nicely as I seldom miss any reminders in real time. I run Thunderbird only on my office desktop. I do not have any volume of email or external requirement that I need access to my mail from any device anywhere in the world. Moving ReminderFox to Thunderbird means I might occasionally miss reminders when not sitting at the office computer — mostly reminders that I postpone for a few hours.
There also is the Lightning add-on for Thunderbird, but I do not need a full-fledged calendar program. Lightning would not provide me any benefit over ReminderFox.
Using my laptop is where I will miss ReminderFox in Firefox. I do not use Thunderbird on the laptop. Possibly I could run Thunderbird bare-bones to bubble out reminders when away from the office desktop. Seems silly to run that kind of overhead just for reminder events. Possibly there might be a way to intercept or forward a ReminderFox popup and send a remote notification to the laptop. I am not going to spend much time pursuing that idea. I have VNC access to the office desktop from the laptop. Some time ago I conjured a way for me to receive remote notification popups on the laptop when I receive email on the office desktop. Although not automated in the same manner I can access the office desktop to see if I missed any reminders.
I have been using ReminderFox in Thunderbird for several days. Thus far, no trauma.