Using the diff provided in this thread on MozillaZine's forums, I was able to construct a rudimentary extension that reverts the find bar in Firefox to its original find dialog.
Version 2.2 restored some XBL bindings that were removed between Firefox 2 and 3. It is only compatible with Firefox 3.0.*.
Version 2.3 bumps the maxVersion for Firefox 3.5. It is only
compatible with 3.5. For Firefox 3.0.*, use version 2.2.
For Firefox 2 and below, use version 1.4.1 or below.
Retro_Find_2.3.xpi - 18.7KB - 9e16d64bca782d2792521f437a4ca368
maxVersion to 3.5.*flex="1"minVersion to 3.0premaxVersion to 3.0.*maxVersion to 1.5.0.*maxVersion to be compatible with Firefox 1.5Retro_Find_2.2.xpi - 19.2KB - 2c4502fb30fd132d12aab1c3f8192c24
Retro_Find_2.1.xpi - 18.7KB - 1fb3ab875a5c506b5835504a688db764
Retro_Find_2.0.xpi - 19.5KB - aade26c08b5334bb4281f43c44b63290
Retro_Find_1.4.xpi - 8.34KB - E3687AB10EF862AC417F89324B3CD577
Retro_Find_1.3.xpi - 15.9KB - 216D7A9C093F82079887ACC081E4B5AE
Retro_Find_1.2.xpi - 14.0KB - EEB2C4DDBFE5DE040BC93AF70E44C6D2
Retro_Find_1.1.xpi - 13.2KB - 8BEB3E952F93B8ADA30642E7C84F1D89
Retro_Find_1.0.xpi - 6.09KB - 2AA79115D35B171210251F7E44ACF011