My version with latest NVDA sometimes is very slow just moving through the message list. Takes as much as 5 seconds after pressing down arrow to move to the next in the list.  I have message pain turned off.


I notice it speeds up after a few minutes. Think Thunderbird does a lot of extra processing when first opened.


Here are some of my Thunderbird Options:

Options  dialog
list
Display  radio button  checked  2 of 8
tab control
Advanced  tab  selected  3 of 3
property page  Reading
Open messages in:  grouping
An existing message window  radio button  checked  Alt+e  3 of 3
Close message window/tab on move or delete  check box  not checked  Alt+C

I just turned on Use hardware acceleration when available; turned off auto and smooth scrolling.  Not sure which of these settings works best on my system.  ,  It is an older i5 processor with onboard graphics; no dedicated graphics card.




Advanced  radio button  checked  8 of 8
tab control
General  tab  selected  1 of 5
Scrolling  grouping
Use autoscrolling  check box  not checked  Alt+U
Use smooth scrolling  check box  not checked  Alt+m
System Integration  grouping
Always check to see if Thunderbird is the default mail client on startup  check box  not checked  Alt+A
Check Now…  button  Alt+N
Allow Windows Search to search messages  check box  not checked Alt+S
Advanced Configuration  grouping
Enable Global Search and Indexer  check box  not checked  Alt+G
Message Store Type for new accounts:  combo box  File per folder (mbox)  collapsed  Alt+T
Use hardware acceleration when available  check box  checked Alt+h