How do I clear my browser cache and cookies, reset my browser settings, and update my browser?

First, why do we suggest that you clear your browser cache and cookies, reset your browser settings, or update your browser when you're seeing unblocked ads?

  • Your browser cache may retain information from a previous visit to a website with ads.
  • A website may have created cookies on your computer that interfere with ad blocking.
  • Malware can change your browser settings to keep your ad blocker from working.
  • Browsers sometimes have bugs that make it difficult to block ads properly. Updating your browser makes sure it has any bug fixes that have been released.

Clear your browser cache and cookies


  1. Chrome/Opera menu > More tools > Clear browsing data
  2. In the Obliterate from: list, select the beginning of time.
  3. Select Cached images and files and Cookies and other site and plugin data.
  4. Click Clear browsing data.
  5. The chrome://settings page opens after you clear browsing data. Type content/cookies at the end of the address on that tab (in other words, you're opening the chrome://settings/content/cookies page).
  6. Next to All cookies and site data where it says "Search cookies," type the name of the website where you're seeing ads.
  8. Restart the browser.


How to empty cache in Safari for Mac OS X. Remember to restart Safari afterward.
This helpful article from includes where to find the web caches for different versions of MacOS and a few additional tips for troubleshooting Safari.

Microsoft Edge
  1. Click the More menu (...), then select Settings.
  2. Under Clear browsing data, click Choose what to clear.
  3. Uncheck everything except Cookies and saved website data and Cached data and files (leave those selected).
  4. Click Clear.
  5. Restart Edge.


  1. Click the Library button, select History, and then select Clear Recent History.

    Clearing browsing data in Firefox

  2. Click the drop-down menu next to Time range to clear and select Everything.

    Selecting which items in your Firefox browsing history to clear

  3. Click the arrow next to Details and select Browsing & Download History, CookiesCache. and Offline Website Data.
  4. Click Clear Now.
  5. Restart Firefox.

Reset your browser settings

Do this only if clearing your cache and cookies doesn't fix the issue.

Warning: Be sure to back up your saved passwords and bookmarks first! If you're not sure how, search for "backup saved passwords and bookmarks [your browser name]" in your favorite search engine, replacing "[your browser name]" with your browser as appropriate.


  1. Chrome/Opera menu > Settings.
  2. At the bottom, click Show advanced settings.
  3. Under the section Reset, click Reset, and then click Reset again to confirm.


  1. Safari menu > Safari > Preferences.
  2. Select the Advanced tab and click Show Develop menu in menu bar.
  3. Develop > Empty Caches.

Microsoft Edge

Reset Microsoft Edge to default settings


  1. Click the menu button, click helpand select Troubleshooting Information, OR, enter about:support in the address bar to bring up the Troubleshooting Information page.
  2. Click Refresh Firefox at the top right corner of the page (Reset Firefox in older Firefox versions).
  3. Firefox will close. After the refresh process completes, click Finish in the window that opens.

Update your browser


  1. Click the menu button.
  2. Click Update Google Chrome. If you don't see this, you're on the latest version.
  3. Click Relaunch.


Safari is included with your Mac. To get the latest version of Safari, install the latest macOS.
To keep Safari up to date for an earlier macOS, install the latest updates for that macOS

Microsoft Edge

Edge is built into Microsoft Windows. To update Edge, update Windows.
  1. Click the Windows button, then click the gear icon (Settings).
  2. Click Update and Security.
  3. In the left side menu, click Windows Update.
  4. If an update is available, click Install now.


  1. Click the menu button, click help, and then select About FirefoxIf an update is available, it will download automatically.
  2. When the update is ready, click Restart Firefox to Update.

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