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Firefox automatically uses settings based on the computer's hardware specifications .
Adjusting these settings can be done in Preferences or by changing the .
Every object loaded (html page, jpeg image, css stylesheet, gif banner) is saved in the Firefox cache for future use without the need to download it again.
It is estimated that only a fraction of these objects will be reused, usually about 30%.
This section contains advanced Firefox options for performance tweaking.
For additional information see these Mozilla Zine articles.
A good way to improve start-up and some other bookmarks and history related tasks is to defragment and trim unused space from these databases. See the main article: Font configuration Modifying the following value can help improve the way fonts looks in Firefox if the system's DPI is below 96.
Firefox, by default, uses 96 and only uses the system's DPI if it is a higher value.
But, since there are no managing processes checking and optimizing the database, these factors eventually result in a performance hit.
However you may want to manually adjust this setting to increase performance even further or decrease memory usage on low-end devices.
In this case the Content process limit for the current user has been increased to 4: and under the "Graphics" section look for "Compositing".
To force the system's DPI regardless of its value, type to 0.
Note that the above method only affects the Firefox user interface's DPI settings.