Very few users empty their browser cache regularly. Mostly the desired surfing experience is guaranteed with the download of Mozilla Firefox. However, occasional problems may require the emptying of the cache. But as one proceeds best if you do not want it to lose all the files?
The crux of the Firefox cache
In Firefox cache accumulate over time many files. They are buffered and do not need to be renewed if each page layout. This approach saves time and bandwidth. but it is possible that Firefox for example, cached browser redirects. These are renewed, the browser uses the old information anyway. Then a cache flush mounted. But also with other problems, it may be necessary to subject the cache of a thorough cleaning. It is not even necessary to delete all items in the cache. The smart browser extension Cache Viewer Continued deletes selected files from the Firefox cache. Thats how it works: 
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Download Cache Viewer Continued down, install it and restart Firefox.
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Click on the Firefox menu Extras (You may need to press the Alt key to display the menu) Web developers and Cached files.
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This opens the Cache Viewer. Search in the list, select the item out, click on it with the right mouse button and press Erase. Given the large number of files in the cache, it may be necessary to filter the entries. Simply enter a search term in the top search box. "Mozilla" for example, lists only files / URLs that contain this term. Cache Viewer Continued shows that you do not have to empty the whole cache to delete just one file. The valuable cache that has built up over time is retained.
fishing videos from the Firefox cache
The Firefox cache can also be used for another trick that lets you expand its video collection:
- Web Capture videos with browser-trick