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Since yesterday I have Thunderbird nebula 128.2.3esr on my Windows 10. But I cannot find my calendar and the new left sidebar isn't available, but only a little button on the left upper corner with seven button without function. I've tried a lot, I cannot find any description about a same failure in the Internet.

[https://www.facebook.com/paing.l.htet.../paing.l.htet.503?mibextid=ZbWKwL] # * Numbered list item

I have two iCloud mails in Thunderbird. The older one runs great. For the other new one - same settings - mails sent often appear totally blank in the sent folder. Going to the iCloud webmail, sent messages appear totally normal and mails are sent to destination without any problem. I tried everything, no avail. Also weird is I have two "sent" folders (for no clear reason). Both have this issue, not always. See screenshot of iCloud webmail.

I am getting these messages when trying to reply: mail.iinet.net.au587 and Sending of message failed. Peer's Certificate has expired. The configuration related to must be corrected. I would like to know what to do to correct this.

Is there a program to fix firefox after an up date as it now can't browse.. Or is the answer go to Opera. As there seems to be no answers on here. Firefox has been good up until this year as every time it update it has problems or removes most of my stuff I use daily. I have been on my pc for over 3 hours trying to find how to fix it.

Latest update (10/2/24) is impossible to use. How can I get back the prior version for Mac OS Sonoma 14.6.1 on my Macbook Air?

I have a TBI that really limits my ability to process information. The tabs now have a dropdown that is very confusing and gets in the way of my working. I have to shut Firefox and leave the computer, but of course when I am recovered from the confusion, I come back to the same situation.

I was able to find a way to stop the even-more-frustrating dropdown video preview, but it's not enough.

I have relied on FF for years, but it seem that putting more bells & whistles is more important than providing a functional browser interface. Please explain to me in plain English how to remove the overloaded browser and revert to a version I can utlize without a breakdown.

Searching calendar events in Thunderbird used to search both title and description fields. For example, if I searched for "dental" it would find events titled "Dental appointment" and also events with "dental" somewhere in the description field. Now it only seems to search the title. I've always put most of the information in the description field, and I use the calendar primarily as a diary record of my life and things I need to keep track of, so this is a major downgrade in terms of usability for me. Is there any way to still search the description field?

How do I get back into Windows? I am stuck on a page asking for a "challenge question" and I don't know what that is or how to get unstuck and back Windows. It asks to fill in something with the example 'A1b2C3' . This is an issue with Windows 11. I am typing now on my Windows 10 laptop. I tried doing a safe boot up but cannot get rid of the 'challenge phrase' screen to do anything else at all except shut down. Every time, it boots up to show the same. It would not accept my fingerprint, password or PIN prior to the lock down. Too many invalid attempts at signing in is the message on the screen.

When i browse any web site then it sometime show me different language. in my case here you see some different language but it properly English language. so you assist me how to solve this problem.

I'm taking nightly incremental backups of /home for example to my home storage server and, I guess, due to the databases Firefox uses for various storage, those can't be backed up by just copying them, if Firefox is running and has the database open.

What are the best practices, then, for ensuring all profile data, including these databases, is in a state where it can be backed up, while Firefox is running, in a way it can be restored to a fully functioning profile?

For example, with MySQL databases, you can dump the log before running the backup each night, which basically exports the SQL statements needed so you can skip backing up the actual binary database file (like ibdata1).  Does SQLite need something similar?  and is this the only special consideration that is needed, or are there other specialized types of data within our profile directories that can't be backed up by simply copying the data while Firefox is running?

Thanks