Firefox too slow when opening new window or typing in the URL

[deloptes <deloptes@gmail.com>]

Hi all,
perhaps someone of you has dealt with this issue and can give me an idea how
can I fix it.

Since couple of months firefox is taking too long to open a new window or
new page.
When I press "CTRL+n" it opens the window but whole firefox gets blocked
until something happens in the background and then all content is visible
again.
When I start typing the URL same behavior. Not all the time, but mainly
related to new window.

I use this user profile for approx. 15y and the profile is located on NFS
share. I have 1GB connection to the server. I was thinking maybe that it is
because the sqlite databases grew with the time or there is a race
condition violated.

attached are the databases in the profile

thanks in advance

-rw-r--r-- 1   524288 Jan 21  2014 .mozilla/firefox/profile/addons.sqlite
-rw-r--r-- 1    98304 Jan 21  2014 .mozilla/firefox/profile/chromeappsstore.sqlite
-rw-r--r-- 1   329728 Feb 16 15:25 .mozilla/firefox/profile/content-prefs.sqlite
-rw-r--r-- 1   524288 Feb 17 09:52 .mozilla/firefox/profile/cookies.sqlite
-rw-r--r-- 1  1048576 Feb 15 08:16 .mozilla/firefox/profile/cookies.sqlite.bak
-rw-r--r-- 1   131072 Feb 15 08:16 .mozilla/firefox/profile/cookies.sqlite.bak-rebuild
-rw-r--r-- 1    32768 Feb 17 09:52 .mozilla/firefox/profile/cookies.sqlite-shm
-rw-r--r-- 1   721456 Feb 17 09:52 .mozilla/firefox/profile/cookies.sqlite-wal
-rw-r--r-- 1    65536 Jan 21  2014 .mozilla/firefox/profile/downloads.sqlite
-rw-r--r-- 1   458752 Jan 21  2014 .mozilla/firefox/profile/extensions.sqlite
-rw-r--r-- 1 20217856 Feb 17 09:04 .mozilla/firefox/profile/favicons.sqlite
-rw-r--r-- 1    32768 Feb 17 09:50 .mozilla/firefox/profile/favicons.sqlite-shm
-rw-r--r-- 1  2131512 Feb 17 09:50 .mozilla/firefox/profile/favicons.sqlite-wal
-rw-r--r-- 1   720896 Feb 17 09:46 .mozilla/firefox/profile/formhistory.sqlite
-rw-r--r-- 1  1277952 Feb 15 21:18 .mozilla/firefox/profile/kinto.sqlite
-rw-r--r-- 1    40960 Jan 28 22:46 .mozilla/firefox/profile/permissions.sqlite
-rw-r--r-- 1 62914560 Feb 17 09:46 .mozilla/firefox/profile/places.sqlite
-rw-r--r-- 1 52428800 Apr  9  2013 .mozilla/firefox/profile/places.sqlite.corrupt
-rw-r--r-- 1    32768 Feb 17 09:50 .mozilla/firefox/profile/places.sqlite-shm
-rw-r--r-- 1  4096000 Feb 17 09:50 .mozilla/firefox/profile/places.sqlite-wal
-rw-r--r-- 1     2048 Apr  9  2013 .mozilla/firefox/profile/search.sqlite
-rw-r--r-- 1   107520 Nov 10  2014 .mozilla/firefox/profile/signons.sqlite
-rw-r--r-- 1      512 Jan  5 01:12 .mozilla/firefox/profile/storage.sqlite
-rw-r--r-- 1 15181824 Dec 27  2009 .mozilla/firefox/profile/urlclassifier2.sqlite
-rw-r--r-- 1 62914560 Apr  9  2013 .mozilla/firefox/profile/urlclassifier3.sqlite
-rw-r--r-- 1 57798656 Feb 17 09:06 .mozilla/firefox/profile/webappsstore.sqlite
-rw-r--r-- 1    32768 Feb 17 09:49 .mozilla/firefox/profile/webappsstore.sqlite-shm
-rw-r--r-- 1   928560 Feb 17 09:49 .mozilla/firefox/profile/webappsstore.sqlite-wal
-rw-r--r-- 1    65536 Jun 19  2012 .mozilla/firefox/profile/xmarks.sqlite