firefox defaults to clearing cache after I have done so when I try to go to gmail

   On your computer, open Chrome.
   At the top right, select More More and then Delete browsing data.
   Choose a time range, like Last hour or All time.
   Select Cookies and other site data.
   Check other items you want to delete.
   To confirm, select Delete data.

   To sign out of your Google Account on all websites, sign out of Chrome.

   In the address bar, to quickly reach the Delete browsing data dialog, type “Delete browsing data” and then, tap the Action chip. Learn more about Chrome Actions to quickly complete tasks.

   Some settings on sites get deleted. For example, if you were signed in, you’ll need to sign in again.
   If you turn sync on in Chrome, you’ll stay signed into the Google Account you’re syncing to in order to delete your data across all your devices.
   Some sites can seem slower because content, like images, needs to load again.

When I log ont Firefox, I can use it. It WAS my default browser. Then I discovered that I could not get to gmail using it. Every time I try to, this is what I get and I have already cleared the cache. Clear cache & cookies When you use a browser, like Chrome, it saves some information from websites in its cache and cookies. You can learn how to clear your cache and cookies in Chrome to fix loading and formatting issues on websites. In Chrome On your computer, open Chrome. At the top right, select More More and then Delete browsing data. Choose a time range, like Last hour or All time. Select Cookies and other site data. Check other items you want to delete. To confirm, select Delete data. Tips: To sign out of your Google Account on all websites, sign out of Chrome. In the address bar, to quickly reach the Delete browsing data dialog, type “Delete browsing data” and then, tap the Action chip. Learn more about Chrome Actions to quickly complete tasks. Learn how to change more cookie settings in Chrome. For example, you can delete cookies for a specific site. In other browsers If you use Safari, Firefox, or another browser, check its support site for instructions. What happens after you clear this info After you clear cache and cookies: Some settings on sites get deleted. For example, if you were signed in, you’ll need to sign in again. If you turn sync on in Chrome, you’ll stay signed into the Google Account you’re syncing to in order to delete your data across all your devices. Some sites can seem slower because content, like images, needs to load again.