What is causing the ‘can’t set Firefox as the default browser’ issue?
We investigated this particular issue by looking at various user reports and the workarounds that they used to make the setting permanent. Based on our investigations, there are a couple of common scenarios that are known to trigger this erroneous behavior: If you’re currently looking for a fix that will resolve this particular behavior, this article will provide you with several troubleshooting strategies. Down below, you’ll discover several methods that other users in a similar situation have successfully used to get the issue resolved. If you want to remain as efficient as possible, we encourage you to follow the methods in the order that they are presented, since the potential repair strategies are ordered by efficiency and severity.
Method 1: Reinstalling Firefox
If the issue is caused by a bad Firefox installation, reinstalling the browser along with all its components will resolve the issue in a swift matter. Several affected users have reported that this procedure allowed them to finally set Firefox as the default browser on their Windows 10 computer. Here’s a quick guide on reinstalling Mozzila Firefox to resolve the ‘can’t set Firefox as the default browser’error:
Method 2: Changing the default browser from the Default Apps
Most users that we’re struggling to get Windows 10 to remember Firefox as the default browser has reported that they were able to get the setting to stick by modifying the default browser from the Default Apps menu. As it turns out, going this route will make Windows 10 a lot more likely to recognize Firefox as the default browser. Here’s a quick guide on changing the default browser via the Default Apps menu: If you find that the setting you previously set has not persisted, move down to the next method below.
Method 3: Using the classic Control Panel menu
If the two methods above didn’t allow you to resolve the issue and you’re still seeing that Firefox is not being accepted as the default browser, you can try to repeat the operation from the classic Control Panel menu. Several affected users have reported that the default browser change became permanent after they used the old Control Panel interface to change the default browser. Here’s a quick guide on using the classic Control Panel menu to change the default browser: If you’re still encountering the same issue, move down to the next method below.
Method 4: Enforcing Firefox via the Defaults by App menu
If you’ve come this far without a result, there’s one final method that might just allow you to get the issue resolved and get the default browser preference to remain set to Firefox indefinitely. Several users that tried most of the other methods featured above without success have reported that they were finally able to get a permanent change by using the Choose defaults for this program menu. Here’s what you need to do:
Method 5: Using Command Prompt
In certain situations, Firefox can be set as the default browser by using the command prompt. Just follow along with the steps listed below to do so.
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