1. Go to the History menu and select "Show all History"
2. In the Library window that opens, select this month on the left side to filter your history items to just those from this month.
3. Then type google in the search bar (upper-right) to further filter the results to just google visits this month.

I've attached a screenshot of what it looks like on my Mac. It looks basically the same on Windows XP.

Firefox only shows the last time that you've visited an URL and a visit count.

You will have to use the SQLite Manager extension to see all visit dates.

You can use this query and change url LIKE '%google.com%' to the URL that you want to check.
A percent symbol ("%") in the LIKE pattern matches any sequence of zero or more characters in the string.

• SQLite Manager: https://addons.mozilla.org/firefox/addon/sqlite-manager/

1. Open Profile Directory -> places.sqlite -> Go
2. Hit the Execute SQL tab
3. Use a Select like this:

SELECT datetime(visit_date/1000000,'unixepoch') AS visit_date, url, title
FROM moz_places, moz_historyvisits
WHERE moz_places.id = moz_historyvisits.place_id AND url LIKE '%google.com%'

• Click Run SQL to generate a results list
• Click the Action button to Save the results to a CSV file

See also:

• http://www.sqlite.org/lang_expr.html#like

• A percent symbol ("%") in the LIKE pattern matches any sequence of zero or more characters in the string
• An underscore ("_") in the LIKE pattern matches any single character in the string
• Any other character matches itself or its lower/upper case equivalent (i.e. case-insensitive matching)