In general, Firefox developers prepare updates to improve program speed whenever a feature is tested well and has a low risk of causing errors. There is no magic button to triple your internet speed. That being said, you can improve the speed a bit by playing around with the settings. The most common cause of speed loss is an add-on that doesn't work well, but you can fix it easily.
Method 1 of 3: Change configuration settings
Step 1. Update Firefox
Many improvements from the past are now included by default in Firefox. To take advantage of it, you need to update it to get the latest version. This is done automatically when you check the version number.
Step 2. Save the preferences file
These settings can cause bugs and slow Firefox performance for some users. You can usually go back to it without any problems, but you should still save the file in case you want to revert to your old preferences.
- Open a new tab and type about: support in the address bar.
- Find the profile folder and click Show Folder Next to it (or Show in Finder on a Mac).
- Go up one level in the folder that opens. You should see a folder there whose name contains letters and numbers and ends with ".default".
- Right click on the folder and choose To copy, then right click on the save location and select To stick on.
Step 3. Try one setting at a time
These settings are designed for advanced users and they might cause issues with your add-ons. It is better that you change one parameter at a time so that you can check the result.
You can find tools online to check your browser speed
Step 4. Adjust the connections to the server
The browser limits the number of simultaneous connections to a single server. Increase this limit to produce a visible change in page and video loading, if your bandwidth allows. However, it would be best to avoid increasing it too much, as you might get banned from the server, but you still have a little leeway.
- Find network.http.maximum-persistent-connections-per-server and double click Value. Increase it to the maximum (10). Some users prefer to leave it at 8 so as not to take any risks.
- Look for network.http.maximum-connections. Set the value to 256 if it is not already.
Step 5. Turn off the animations
Firefox displays small animations when it opens or closes tabs. In general, this is not a problem, but you can avoid rowing the browser if you often open or close tabs.
- Set browser.tab.animate to False.
- Set browser.panorama.animate_zoom to False.
Step 6. Consider disabling preloading
This is a function that allows you to load pages before consulting them by guessing them from the links you click. When working properly, the feature should only use the browser's idle time and should increase the loading speed. If you suffer from low load speeds, improper preload configuration may be the cause. Make the following changes to disable both forms of preloading, then reverse them if that doesn't improve speed.
- Pass network.dns.disablePrefetch to True.
- Pass network.prefetch-next to False.
- Change the value of network.http.speculative-parallel-limit to zero.
Step 7. Enable or disable hardware acceleration and WebGL
These functions use the graphics card to speed up certain functions, especially video loading. However, it can cause lag times or blurry texts, especially if you are using an old operating system or an old graphics card. Try watching videos that explain how to turn these settings on or off to find out which one works best for you.
- Pass webgl.disabled to True Where False.
- Open about: preferences # advanced in a new tab. Check or uncheck Use hardware acceleration (use hardware acceleration).
- Unlike most settings changes, you must restart Firefox to see Firefox work.
Method 2 of 3: Troubleshoot losing speed
Step 1. Install an ad blocker.
On many web pages, advertisements take a bit of time to load. Install Adblock Plus or another ad blocker to avoid losing speed.
Many websites depend on advertisements to survive. Consider letting them show up on sites you support
Step 2. Start Firefox in Safe Mode
Click on the menu icon (the three horizontal bars), then on the help icon? and on
Restart with the add-ons disabled. If Firefox is running faster in Safe Mode, it's probably because an add-on that's not working well is slowing it down.
Step 3. Disable add-ons
Enter about: addons in the address bar or click on the menu icon (the three horizontal bars) before selecting Add-ons. Disable one add-on at a time and use the browser for a little while to see a difference. Go to the same page to remove the add-on permanently or to reactivate it, depending on the test results.
Step 4. Switch to the default theme
If you have a custom theme, it might slow down your browser. Go to the tab Appearances on the add-ons page and switch to the default theme.
Step 5. Reduce memory usage
If you just closed multiple tabs, Firefox may continue to idle for a while until it clears the contents of those tabs from memory. Get rid of it right away by going to about: memory before clicking on
Reduce memory usage.
Step 6. Adjust the cover
This is another feature that could speed up your browsing in general, but can slow it down if it gets too full. To adjust the size, go to about: preferences # advanced, click on the tab Network and tick Manage the cache manually. Increase the cache size if you have a fast access hard drive with a lot of space, and reduce it by about 250MB if you have a slow or near full hard drive.
Clear the cache every two months or whenever you notice that the browser is running slower. You should also clear the cache before reducing its size
Step 7. Reset Firefox
If you observe idle operation on a broadband connection, you may have to reset it to eliminate an add-on that is crashing or to confirm a change in settings. This will erase all add-ons, themes, and download history back to default settings. Go to about: support and click Refresh Firefox or see this article for more information.
Method 3 of 3: Use pipelining
Step 1. Understand pipelining
This is a function that allows Firefox to open more than one connection on the same server. It will help you if you have a broadband connection. Even then, it only allows a minimal increase in speed and could even cause minimal loss of speed or errors. The differences in the results probably depend on how the page is structured, which is why you can try it out to see if it helps for the sites you visit.
Step 2. Go to about:
config. Open a new tab in Firefox and enter about: config in the address bar.
Step 3. Activate the pipelining
Look for network.http.pipelining in the bar at the top of the page. This input should be set to Status: default and Value: false. Double click on the line to set “Status” to user set and "Value" on true.
Step 4. Adjust other settings (optional)
There are other settings that you can try to change as well. It is not recommended that you change them unless you know exactly what you are doing. Here are a few you could try.
- network.http.pipelining.maxrequests was limited to 8 for many years, but now the limit has been set (by default) to 32. However, increasing this number could cause errors. A drop could reduce the upload speed, but free up some bandwidth.
- The activation of network.http.pipelining.aggressive is double or even: when it works, Firefox will work faster, when it does not work, it will work slower.
- If you use a proxy to use the Internet, you will need to activate network.http.proxy.pipelining (you must search again to find it).
Step 5. Proceed to the secure pipeline
If you find that pipelining is slowing you down or causing errors on web pages, you can reset the setting to its default position (false). You can still set up pipelining on safe sites by activating network.http.pipelining.ssl. Most pipelining errors come from proxies which are not a problem with a secure connection.
Despite the problems of "insecure" connections, pipelining should not expose you to risks related to the security of your computer
If a change causes your computer to run slower or not load images properly, revert your changes to about: config or restore the backup file
- There are many myths surrounding changing Firefox settings. There are some that are hardly ever going to improve loading speed, such as increased cache in RAM and initial display delay.
- It is not recommended to install an add-on to increase the speed. It will only change the settings discussed in this article, giving you less control over the changes, and it might also use methods that are no longer relevant.