Usually, this issue is caused by your web browser’s cache. And how can you get rid of it so you can see your updates?Cache is the term used when information is stored for future use.Some extensions may interfere with the way websites are displayed or your graphics card and drivers don't display some web content correctly when hardware acceleration is turned on.
If a website has updated their code, Firefox may still be using some of the old code along with some of the new, which can make a web page display incorrectly.
To fix this, you need to clear the cookies and cache: Now that your cookies and cache are cleared, visit the website again to see if the problem is solved.
In your computer’s case, your web browser (Internet Explorer, Google Chrome, Mozilla Firefox, etc.) stores versions of websites as you view them and shows them to you in the future instead of downloading the newest version.
Your browser does this because using cache allows the page to load much faster since it’s already stored on your computer.
Once you clear your cache, the browser will stop using the saved version of your site and go grab the newest version, including your updates.