Clearing Cache and Cookies

A lot of hiccups in Gmail arise from corrupted cookies or cache.  There are instructions around on how to do this, but it can be difficult to find them.  The Gmail Help Article only gives the instructions for Google products.  The links to other browsers given there are almost useless because they just point to the home page for each other browser's support site.

So here is a collection of instructions for all browsers.  Each heading is a link to the vendor's site where I collected the instructions.

Chrome

1. On your computer, open Chrome.
2. Sign out of your Google account if you are still signed in.
3. On your browser toolbar, click More  More Tools  Clear Browsing Data.
4. In the "Clear browsing data" box, click the checkboxes for Cookies and other site data and Cached images and files.
5. Use the menu at the top to select the amount of data that you want to delete. Choose beginning of time to delete everything.
6. Click Clear data.

 Firefox

On 9 October 2018, I noticed that version 62 has different menu structure.  For V62:

1. On your computer, open Firefox.
2. Sign out of your Google account if you are still signed in.
3. Click the menu button  and choose Options.
4. Select the Privacy & Security panel.
5. Under Cookies and Site Data , click on the Clear Data button.
6. Select both Cookies and Site Data and Cached Web Content then, click Clear.

If you are using an older version of Firefox, these instructions might apply

1. On your computer, open Firefox.
2. Sign out of your Google account if you are still signed in.
3. Click the menu button and choose Options.
4. Select the Advanced panel.
5. Click on the Network tab.
6. In the Cached Web Content section, click Clear Now.

 Internet Explorer

1. On your computer, open Internet Explorer.
2. Sign out of your Google account if you are still signed in.
3. In Internet Explorer, select the Tools  button, point to Safety, and then select Delete browsing history.
4. Choose the types of data or files you want to remove from your PC, and then select Delete.

Edge (New version based on Chromium)

1. On your computer, open Edge.
2. Sign out of your Google account if you are still signed in.
3. To view your browsing history, select the ... icon, then History > Clear browsing data.
4. Choose the types of data you want to remove from your PC, then select Clear now.
5. If you use Cortana and want to clear browsing history that's stored in the cloud, go to https://account.microsoft.com/account/privacy and sign into your Microsoft account.

Edge (before version 81)

1. On your computer, open Edge.
2. Sign out of your Google account if you are still signed in.
3. To view your browsing history, select the ... icon, then History.
4. Select Clear history (top right).
5. Choose the types of data you want to remove from your PC, then select Clear.
6. If you use Cortana and want to clear browsing history that's stored in the cloud, select Change what Microsoft Edge knows about me in the cloud, then select Clear browsing history.

 Safari

Desktop

1. On your computer, open Safari.
2. Sign out of your Google account if you are still signed in.
3. Click on the Safari option on the menu bar and navigate to “History > Clear History”.
4. Choose how far back (time range) you want to clear the browsing data.
   Please note that if your Mac and your other iOS device such as iPhone or iPad have Safari turned on in iCloud preferences, your browsing history would be removed from all of them if you take this action.

Mobile app

1. Launch the Settings app from the Home screen of your iPhone or iPad.
2. Scroll down and tap on Safari.
3. Now scroll all the way to the bottom and tap on Advanced.
4. Tap on Website Data. ...
5. Scroll to the bottom again and tap on Remove All Website Data.
6. Confirm one more time you'd like to delete all data.

 Opera*

1. On your computer, open Opera*.
2. Sign out of your Google account if you are still signed in.
3. From the main menu, select History.
4. Hover over any entry and click the X that appears on the right.
5. To clear all browsing history, including cookies and more, click the Clear Browsing Data… button on the top-right of the page. Read more about clearing private data.

* Opera is not officially supported by Gmail, but many users find it works.

Please note: If you have issues with Gmail, do not comment here.  Ask your question at the Gmail Help Community https://support.google.com/mail/community