How to clear the web browser's cache, cookies, and history
    Why do you need to clear the browser cache?
Cache is the
temporary internet and websites files. These files are saved to be used by the
browser to cut down the web page loading time instead of reading the websites
content every time you access them. When a website
gets updated, the browser will continue using the old saved files. As a result,
web pages might not load properly as expected. Hence, you need to delete these
old files by clearing the cache.
Furthermore, you need to clear the browser cache periodically to prevent or resolve performance problems. 
    Note that,
clearing the browser cache may remove data such as saved passwords, websites
history, etc. Hence, you may need to backup some of your saved information
first.    
Clearing cache, history & cookies in Desktop Browsers 
    In most computer-based web browsers, to open menus used to clear your cache, cookies, and history, press Ctrl-Shift-Delete (Windows) or Command-Shift-Delete (Mac).    
Microsoft
Edge
- In the top
right, click the Settings icon (looks like three horizontal dots).
 
- Click the Settings, find Privacy, search, and services and then click on Choose what to clear button under Clear browsing data.
 
- In the Time range dropdown, select All time.
- Select Browsing
history, Cookies and saved website data, and Cached data
and files. Click Clear.
 
- After the
"All Clear!" message appears, exit all browser windows and
re-open the browser.
 
Google Chrome 
- In the top right, click the Settings icon (looks like three vertical dots).
 
- Select History
and then click on History from the sliding menu
 
- From the menu at the left side, choose Clear browsing history
 
- From the Time range drop-down menu, select All time
 
- Select Browsing
history, Download history, Cookies and other site and plug-in
data, and Cached images and files
 
- Click on Clear data
 
- Exit all
browser windows and re-open the browser.
 
Firefox
- In the top
right, click the Settings icon (looks like three horizontal lines)
 
- Click on History and then choose Clear Recent History…
 
- From the Time
range to clear: drop-down menu, select Everything
 
- Select Browsing
& Download History, Cookies, Cache, and Offline Websites
Data
 
- Click on Clear
Now
 
- Exit all
browser windows and re-open the browser.
 
 
MAC Safari
8.0 – 10.0
- From the Safari menu, choose Preferences
 
- Click on Privacy
 
- Click on Remove All Websites Data…
 
- In the pop-up message, click on Remove Now
 
- Exit all
browser windows and re-open the browser.
 
Clearing cache, history & cookies in Mobile Browsers 
Android 7
(Samsung Internet and Google Chrome)
- From the Apps dashboard, tap Settings
 
- Tap Apps
 
- Select the app
you want to clear the cache for
 
- Tap Storage
 
- Tap Clear
Cache
- 
Exit all browser windows and re-open the browser.   
iOS 11
(Safari)
- From the Apps dashboard, tap Settings
 
- Tap Safari
 
- Tap Clear History and Website Data
- 
Exit all browser windows and re-open the browser. 
 
 
iOS 11 (Google
Chrome)
- Open Google
Chrome app
 
- In the top
right, tap the Settings icon (looks like three vertical dots)
 
- Tap Privacy and then tap Clear browsing data
 
- Check
"Cookies, Site Data." check other items if needed
 
- Tap Clear
Browsing Data
 
- Confirm by tapping Clear Browsing Data
 
- Tap Done
 
- Exit all
browser windows and re-open the browser.