default setting causes browser freezing immediately post-install ('seconds between memory data collection')

[jwmh]

hello!

i just installed your lovely add-on, and it's great.

except for this (initial) problem:
i had about 70 tabs open when i installed this...

.... hence, immediately after installing, the "seconds between memory data collection" was causing problems.
(default is '10' seconds as of this writing).

caused my browser to freeze, unfreeze, freeze, unfreeze, freeze....

and it took me about three (3) minutes to get the addon-settings dialogue open, add another two 0's to the end (so it's every 1000 seconds, not every 10), and then refocus to a different field so that new setting took effect.

now, it's working great.
but the initial installation caused my browser to freeze up immediately, and another several minutes to get past that hang.

yes, i'm running this on very old hardware.

request:
i strongly suspect that some other future users will greatly appreciate having the default set to a much larger number of seconds (one or two magnitudes higher).

but.... for developers/testing,
i can understand why they'd want a smaller interval.
so, maybe have a pointer directing them to change the setting to 10 or smaller -- with the warning/caveat that it may cause their browser to hang, if they have a large number of tabs open?

thoughts on this?
again, i love your add-on in every other respect -- this was just a momentary hiccup on installation.
thank you so much for making this!