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  1. Home >
  2. Blog >
  3. Firefox 3 History
Kristinn Guðjónsson

Firefox 3 History

July 15, 2009

Analysis of a browser history almost always comes up, no matter what is being investigated. And despite Firefox being one of the most popular browsers currently used there aren't many tools out there that can read and display browser history (at least in a human readable format). There are tools out there, such as f3e from FirefoxForensics.com, however that tool, just as others that I've found, is only distrubuted as an EXE, running on Windows (and no source code is provided).

Traditionally Firefox stored the history file as a Mork file format, which could be easily read using any standard editor. The new version, that is version 3 which has been out for quite some time now, uses a different method of storing user history. The history file is stored in a MozStorage format, as a SQLite database (see description here) in a file called places.sqlite. The tables can be easily read using sqlite3 for instance:

sqlite3 places.sqlite ".tables"moz_anno_attributes  moz_favicons         moz_keywordsmoz_annos            moz_historyvisits    moz_placesmoz_bookmarks        moz_inputhistorymoz_bookmarks_roots  moz_items_anno
 

There are two tables in particular that are of interest , the moz_places and moz_historyvisits table. The schema for these tables can as well be easily extracted using sqlite3:

sqlite3 places.sqlite ".schema moz_places"CREATE TABLE moz_places (id INTEGER PRIMARY KEY,url LONGVARCHAR,title LONGVARCHAR,rev_host LONGVARCHAR,visit_count INTEGER DEFAULT 0,hidden INTEGER DEFAULT 0 NOT NULL,typed INTEGER DEFAULT 0 NOT NULL,favicon_id INTEGER,frecency INTEGER DEFAULT -1 NOT NULL);CREATE INDEX moz_places_faviconindex ON moz_places (favicon_id);CREATE INDEX moz_places_frecencyindex ON moz_places (frecency);CREATE INDEX moz_places_hostindex ON moz_places (rev_host);CREATE UNIQUE INDEX moz_places_url_uniqueindex ON moz_places (url);CREATE INDEX moz_places_visitcount ON moz_places (visit_count);

And for the moz_historyvisists:

sqlite3 places.sqlite ".schema moz_historyvisits"CREATE TABLE moz_historyvisits (id INTEGER PRIMARY KEY,from_visit INTEGER,place_id INTEGER,visit_date INTEGER, visit_type INTEGER,session INTEGER);CREATE INDEX moz_historyvisits_dateindex ON moz_historyvisits (visit_date);CREATE INDEX moz_historyvisits_fromindex ON moz_historyvisits (from_visit);CREATE INDEX moz_historyvisits_placedateindex ON moz_historyvisits (place_id, visit_date);CREATE TRIGGER moz_historyvisits_afterdelete_v1_triggerAFTER DELETE ON moz_historyvisits FOR EACH ROWWHEN OLD.visit_type NOT IN (0,4,7)BEGIN UPDATE moz_places SET visit_count = visit_count - 1WHERE moz_places.id = OLD.place_idAND visit_count > 0; END;CREATE TRIGGER moz_historyvisits_afterinsert_v1_trigger AFTER INSERT ON moz_historyvisits FOR EACH ROWWHEN NEW.visit_type NOT IN (0,4,7)BEGIN UPDATE moz_places SET visit_count = visit_count + 1WHERE moz_places.id = NEW.place_id; END;

According to the FirefoxForensics.com web site the explanation of each of keys found in the moz_places is roughly the following:

  • id INTEGER PRIMARY KEY, an integer that indicates the primary key for the database, of no real interest
  • url LONGVARCHAR, the URL that has been visited and the protocol used, something that one likes to examine.
  • title LONGVARCHAR, the title of the page as it appears in the browser
  • rev_host LONGVARCHAR, the reverse of the host name that was visited. used to ease searching and querying into hosts visited in history file.
  • visit_count INTEGER DEFAULT 0, as the variable implies a counter for the site
  • hidden INTEGER DEFAULT 0 NOT NULL,either 0 or 1. if the URL is hidden then the user did not navigate directly to it, usually indicates an embedded page using something like an iframe
  • typed INTEGER DEFAULT 0 NOT NULL,indicates whether the user typed the URL directly into the location bar
  • favicon_id INTEGER,relationship to another table containing favicon
  • frecency INTEGER DEFAULT -1 NOT NULL, combination of frequency and recency, used to calculate which sites appear at the top of the suggestion list when URL's are typed in the address bar.

Since we know the structure and the meaning of each key in the database it is simple to create a script that can parse the database and display the content as you wish. The Perl script I wrote is called ff3histview and can be found here. It reads the places.sqlite database and displays the content of it in a human readable format. The usage of the script is the following:

ff3histview [--help|-?|-help]This screenff3histview [-t TIME] [-csv|-txt|-html] [-s|--show-hidden] [-o|--only-typed] [-quiet]    places.sqlite     -t Defines a time scew if the places.sqlite was placed on a computer with a wrong time settings.  The format of the        variable TIME is: X | Xs | Xm | Xh       where X is a integer and s represents seconds, m minutes and h hours (default behaviour is seconds)     -quiet Does not ask questions about case number and reference (default with CSV output)     -csv|-txt|-html The output of the file.  TXT is the default behaviour and is chosen if none of the others is chosen     -s or --show-hidden displays the "hidden" URLs as well as others.  These URL's represent URLs that the user       did not specifically navigate to.     -o or --only-typed Only show URLs that the user typed directly into the location/URL bar.

     places.sqlite is the SQLITE database that contains the web history in Firefox 3.  It should be lo

The default behaviour of the script is to extract all URL's from moz_places that are not hidden (can be changed using parameters to the script, as well as to only see user typed in URLs). A hidden URL, according to firefoxforensics.com, is a URL "that the use did not specifically navigate to. These are comonly embedded pages, i-frames, RSS bookmarks and javascript calls."[1] So the SQL statement that the script executes is:

SELECT moz_historyvisits.id,url,title,visit_count,visit_date,from_visit,rev_hostFROM moz_places, moz_historyvisitsWHERE moz_places.id = moz_historyvisits.place_id AND hidden = 0

In fact a really simple SQL statement, just to extract the URLs and some other information of value. The "from_visit" that is extracted refers to a URL that the user navigated from. Relevant information about those nodes are extracted as well, giving the investigator more information about context.

The script can output both in text format as well as CSV (Comma Seperated Value) for spreadsheet manipulation as well as a HTML page. Examples of usage (standard default behavior, without asking questions about case details) :

 did not specifically navigate to, use -s to show themDate of run (GMT): 13:7:9, Thu Jul 2, 2009Time offset of history file: 0 s-------------------------------------------------------Date                Count    Host name    URL    notesThu Jun 25 09:16:17 2009    1    www.regripper.net    http://www.regripper.net/Wed Jun 24 20:19:53 2009    1    isc.sans.org    http://isc.sans.org/Thu Jun 25 12:43:14 2009    1    snort.org    http://snort.org/Thu Jun 25 12:43:09 2009    2    www.snort.org    http://www.snort.org/Thu Jun 25 12:53:51 2009    2    www.snort.org    http://www.snort.org/    From: http://www.snort.org/newsThu Jun 25 12:48:09 2009    1    www.snort.org    http://www.snort.org/news    From: http://www.snort.org/Thu Jun 25 18:38:35 2009    1    www.groklaw.net    http://www.groklaw.net/    From:-------------------------------------------------------

And if there is any discrepancies in the time settings of the investigator's machine and the suspect's one:

ff3histview -q -t 14380  places.sqliteFirefox 3 History ViewerNot showing 'hidden' URLS, that is URLs that the user did not specifically navigate to, use -s to show themDate of run (GMT): 13:8:34, Thu Jul 2, 2009Time offset of history file: 14380 s-------------------------------------------------------Date                Count    Host name    URL    notesThu Jun 25 13:15:57 2009    1    www.regripper.net    http://www.regripper.net/Thu Jun 25 00:19:33 2009    1    isc.sans.org    http://isc.sans.org/Thu Jun 25 16:42:54 2009    1    snort.org    http://snort.org/Thu Jun 25 16:42:49 2009    2    www.snort.org    http://www.snort.org/Thu Jun 25 16:53:31 2009    2    www.snort.org    http://www.snort.org/    From: http://www.snort.org/newsThu Jun 25 16:47:49 2009    1    www.snort.org    http://www.snort.org/news    From: http://www.snort.org/Thu Jun 25 22:38:15 2009    1    www.groklaw.net    http://www.groklaw.net/    From:-------------------------------------------------------

And if we want to include "hidden" URL's:

ff3histview -q -t 14380 -s places.sqliteFirefox 3 History ViewerShowing hidden URLs as well

Date of run (GMT): 13:14:58, Thu Jul 2, 2009Time offset of history file: 14380 s

-------------------------------------------------------Date                Count    Host name    URL    notesThu Jun 25 13:15:57 2009    1    www.regripper.net    http://www.regripper.net/Thu Jun 25 00:19:33 2009    1    isc.sans.org    http://isc.sans.org/Thu Jun 25 00:19:36 2009    0    www.sans.org    http://www.sans.org/banners/isc.php    From: http://isc.sans.org/Thu Jun 25 06:14:16 2009    0    www.sans.org    http://www.sans.org/banners/isc.php    From: http://isc.sans.org/Thu Jun 25 15:01:07 2009    0    www.sans.org    http://www.sans.org/banners/isc.php    From: http://isc.sans.org/Thu Jun 25 06:19:18 2009    0    www.sans.org    http://www.sans.org/banners/isc_ss.php    From:Thu Jun 25 15:58:20 2009    0    www.sans.org    http://www.sans.org/banners/isc_ss.php    From:Thu Jun 25 13:15:57 2009    0    www.regripper.net    http://www.regripper.net/links.htm    From: http://www.regripper.net/Thu Jun 25 13:15:57 2009    0    www.regripper.net    http://www.regripper.net/main.htm    From: http://www.regripper.net/Thu Jun 25 13:16:13 2009    0    www.regripper.net    http://www.regripper.net/RegRipper/    From: http://www.regripper.net/links.htmThu Jun 25 13:16:17 2009    0    www.regripper.net    http://www.regripper.net/RegRipper/RegRipper/    From: http://www.regripper.net/RegRipper/Thu Jun 25 13:16:28 2009    0    regripper.invisionplus.net    http://regripper.invisionplus.net/    From: http://www.regripper.net/links.htmThu Jun 25 16:42:54 2009    1    snort.org    http://snort.org/    From: http://www.regripper.net/links.htmThu Jun 25 16:42:49 2009    2    www.snort.org    http://www.snort.org/    From: http://www.regripper.net/links.htmThu Jun 25 16:53:31 2009    2    www.snort.org    http://www.snort.org/    From: http://www.snort.org/newsThu Jun 25 16:47:49 2009    1    www.snort.org    http://www.snort.org/news    From: http://www.snort.org/Thu Jun 25 22:38:15 2009    1    www.groklaw.net    http://www.groklaw.net/    From:-------------------------------------------------------

And for the HTML output:

ff3histview  -t 14380 --html places.sqlite<img src="https://blog.kiddaland.net/dw/ff3histview_html.png" border="0" alt="History HTML" width="650">

Kristinn Guðjónsson, GCFA #5028, works as a forensic analyst and incident handler as well as being a local mentor for SANS.

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