Just FTR about this: http://groups.google.com/group/webdriver/browse_thread/thread/843c99c02508455a/409cd62d813de648?hl=en&lnk=gst&q=Clearing+cache+in+IE#409cd62d813de648
mentions the "RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 4351" trick (hack?),
see e.g. http://stackoverflow.com/questions/825144/how-to-clear-msie-wininet-cache-programatically/3725274#3725274
and http://www.howtogeek.com/howto/windows/clear-ie7-browsing-history-from-the-command-line/,
which is... good enough for us as start (and has been integrated into our in-house
InternetExplorerDriver wrapper - until available via WebDriver API.  Just thought I'd
add this here for the record for others (16 people starred this issue).

PS: http://groups.google.com/group/webdriver/browse_thread/thread/f0c1c83f091bf408/e70fdf5ee521cd4c?hl=en&lnk=gst&q=Clearing+cache+in+IE#e70fdf5ee521cd4c
says "But when 
you start a new Firefox Driver it creates a new profile (don't have to 
clear cache since it's a brand new profile)." which may be of interest to those using
FirefoxDriver (if it's correct? I'm just quoting from the list).

Or you can just create a custom firefox profile with options 

in pref.js add this : 

user_pref("browser.cache.disk.enable", false);
user_pref("browser.cache.memory.enable", false);
user_pref("browser.cache.offline.enable", false);
user_pref("network.http.use-cache", false);

Here is the other pref I also have : 

user_pref("app.update.auto", false);
user_pref("app.update.lastUpdateTime.addon-background-update-timer", 1280826385);
user_pref("app.update.lastUpdateTime.background-update-timer", 1280826385);
user_pref("app.update.lastUpdateTime.blocklist-background-update-timer", 1280826385);
user_pref("app.update.lastUpdateTime.microsummary-generator-update-timer", 1280502030);
user_pref("app.update.lastUpdateTime.places-maintenance-timer", 1280826385);
user_pref("app.update.lastUpdateTime.search-engine-update-timer", 1280826385);
user_pref("browser.EULA.3.accepted", true);
user_pref("browser.EULA.override", true);
user_pref("browser.allowpopups", true);
user_pref("browser.bookmarks.restore_default_bookmarks", false);
user_pref("browser.download.manager.showWhenStarting", false);
user_pref("browser.history_expire_days.mirror", 180);
user_pref("browser.link.open_external", 2);
user_pref("browser.migration.version", 1);
user_pref("browser.places.smartBookmarksVersion", 1);
user_pref("browser.preferences.advanced.selectedTabIndex", 2);
user_pref("browser.privatebrowsing.autostart", true);
user_pref("browser.rights.3.shown", true);
user_pref("browser.safebrowsing.enabled", false);
user_pref("browser.search.update", false);
user_pref("browser.sessionstore.resume_session_once", true);
user_pref("browser.startup.homepage", "about:blank");
user_pref("browser.startup.homepage_override.mstone", "rv:1.9.1.11");
user_pref("browser.startup.page", 0);
user_pref("browser.tabs.warnOnClose", false);
user_pref("browser.tabs.warnOnOpen", false);
user_pref("browser.urlbar.autocomplete.enabled", false);
user_pref("dom.disable_open_during_load", false);
user_pref("dom.max_chrome_script_run_time", 1800);
user_pref("dom.max_script_run_time", 1800);
user_pref("extensions.lastAppVersion", "3.5.11");
user_pref("extensions.update.enabled", false);
user_pref("extensions.update.notifyUser", false);
user_pref("idle.lastDailyNotification", 1280826384);
user_pref("intl.charsetmenu.browser.cache", "UTF-8, ISO-8859-1");
user_pref("network.cookie.prefsMigrated", true);
user_pref("network.dns.disableIPv6", true);
user_pref("network.http.phishy-userpass-length", 255);
user_pref("pref.browser.homepage.disable_button.bookmark_page", false);
user_pref("pref.browser.homepage.disable_button.current_page", false);
user_pref("pref.browser.homepage.disable_button.restore_default", false);
user_pref("privacy.sanitize.migrateFx3Prefs", true);
user_pref("privacy.sanitize.timeSpan", 0);
user_pref("security.warn_entering_weak", false);
user_pref("security.warn_entering_weak.show_once", false);
user_pref("security.warn_viewing_mixed", false);
user_pref("security.warn_viewing_mixed.show_once", false);
user_pref("signon.rememberSignons", false);
user_pref("spellchecker.dictionary", "en_US");
user_pref("startup.homepage_welcome_url", "");
user_pref("urlclassifier.keyupdatetime.https://sb-ssl.google.com/safebrowsing/newkey",
1287053252);
user_pref("xpinstall.whitelist.required", false);

user_pref("browser.cache.disk.enable", false);
user_pref("browser.cache.memory.enable", false);
user_pref("browser.cache.offline.enable", false);
user_pref("network.http.use-cache", false);

Expect tests that use these settings to run at a snails pace :)

Any info on whether this made it in to the API?

Bump. 

Clearing all cookies is very important for starting each test with a clean slate.
Right now we can only delete cookies of current page.

Thanks!

Also nice to have clearing cookies/cache on remote machine using RemoteWebDriver.

Issue 548 has been merged into this issue.

IE: http://blog.patrickmeenan.com/2012/11/clearing-ies-caches-not-as-simple-as-it.html

On this issue, would be interesting to hear if there are any issues and suggested solutions
for completely clearing cache for Chrome and Safari (in terms of scripted/automated
methods). Not sure about Chrome, but do know that Safari has same cache clear issue
as IE (for sure with Selenium RC at least).

Issue 5365 has been merged into this issue.

If one were to extend the JsonWireProtocol:

https://code.google.com/p/selenium/wiki/JsonWireProtocol

Which one of the following would you prefer?

 1. DELETE /session/:sessionId/cache
 2. POST /session/:sessionId/cache/clear

I also think that IE could observe the "ensureCleanSession" desired capability to clear
cookies and browser cache upon a new session.

liulk

https://code.google.com/r/liulk-selenium/source/detail?r=48be0d5614f2c4005ad19fdd761b8bd62ab98bcd&name=topic/cacheclear

Adding desiredCapabilities.ensureCleanSession support to IEDriver.

liulk

On request by jimevans through klm, moved review to GitHub.

https://github.com/SeleniumHQ/selenium/pull/74

liulk

Please update if, the issue is fixed.

One should create a new session to acheive this goal.

There might be some confusion/conflation here between 3 scenarios:

1. Starting a new instance/restarting the whole WD server -- the Selenium jar, chromedriver,
etc.
2. Creating a new browser session via an existing WD server.
3. Clearing cache, cookies, history in an existing browser session/process -- without
restarting the browser.

Doing (1) may be logistically hard, especially when the WD server runs remote from
the test, possibly started by infrastructure "above" the test itself, i.e. the test
has no control over that.

I believe that (2) covers most reasonably structured web tests. I believe Selenium/WebDriver
already implements it for most major browsers, though there are problems with some
browsers, e.g. Mobile Safari without a jailbreak -- no public API for it that I know
of (that's an ios-driver issue, let's not discuss it here -- even doing (1) makes no
difference, it's a general iOS/Safari level problem).

(3) is exceedingly hard to implement, especially in all major browsers. I agree with
barancev@'s "not feasible" for this particular case at the Selenium-wide level. It's
fine to say that _some_ browsers _may_ offer that ability, but it's just unrealistic
to require it for all browsers.