firefox leakage

[Randy Bush]

i386, freebsd 7-current, ibm thinkpad t41

i have tracked a major memory leak (2g in a day, resulting in crash)
to the current build firefox.  result of top -S -osize

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND
 2166 randy         4  20    0   166M   108M kserel   3:51  0.00% firefox-bin
 1343 randy         1  96    0   126M 83500K select   2:44  2.00% Xorg
 1394 randy         4  20    0   102M 51456K kserel   0:08  0.00% nautilus

and five hours later

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND
 1343 randy         1 102    0   334M   277M select  10:06 15.28% Xorg
12780 randy         4  20    0   149M 85364K kserel   0:27  0.00% firefox-bin
 1394 randy         4  20    0   102M 51420K kserel   0:11  0.00% nautilus

notice the growth in xorg and only xorg

so i ran xrestop and it's all firefox

  res-base Wins GCs Fnts Pxms Misc  Pxm mem  Other   Total   PID Identifier    
  5400000   532  44    1 12216  155 385312K    18K 385330K   ?   International
  3a00000     0   0    0    1    0    2887K     0B   2887K   ?   <unknown>ox

International is an open firefox tab.  if i close that one, the excess
is just charged to a different tab.

and it just keeps growing and growing and growing and ...

randy