Battery usage is going extremly up with one of the last updates

[kolbma]

Hi,
can somebody confirm that the battery usage has increased with one of the last updates?!
I think it has started the one before last or two before last.
Currently I have

100.3.0 (Build #2015881499), 409a30ff0+
AC: 100.0.12, 7b24cbd763
GV: 100.0.2-20220519220738
AS: 91.1.1

It doesn't matter which websites I browse. I've already cleaned data, cookies and also deleted and reinstalled the FF app.
But my battery last only 1-2 hours while browsing e.g. Github.
Watching Videos on Amazon App or reading ebooks I can do the whole evening into deep in the night. I've been used to that browsing has been no problem for this Samsung SM-P610 tablet before.
The battery stats also go down in more than 45 degrees curve when FF is running and I can feel the CPU is getting warm under the display.
It needs more battery to type this text here than watching video or using a painting app like Krita for the same time.