Bug#998108: Freeze with jitsi

[Eugen Dedu]

I have similar problems.  When I go to jitsi, for ex. 
https://meet.jit.si/toto, firefox is unresponsive: it does not finish 
loading the tab (the blue point in the tab moves left-right), and 
clicking anywhere in firefox window (menu, tabs, page content) does not 
change anything.  I need to kill it with ctrl-c (in linux).  Nothing is 
exchanged on the network; CPU is small, cf. 'top' tool:
    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ 
COMMAND
  15790 ededu     20   0 3376132 402248 170036 S  13.3   2.5   0:19.66 
GeckoMain

However, it is the first time I see GeckoMain shown in the first lines 
of 'top' (13.3% in the example above).

Downgrading from 93.0-1+b1 to 93.0-1 fixes the problem.