Firefox cached DNS entries. You cant clear firefox dns cache but you can disable firefox dns cache. There are 2 ways of disable firefox dns cache.
1st method to disable firefox dns cache is to install the DNS cache plugin.
- Download and install DNS Cache add on for firefox
- Right click on your “Home” button at Firefox and click on “Customize”
- Look for the “DNS Cache” button and drag it beside your “Home” button, and click “Done”
- Now your Firefox has “DNS Cache” button beside the “Home” button.
- Whenever you want to disable the firefox DNS cache, just click the “DNS Cache” button.
2nd way to disable firefox cache is thru manual editing.
- Start your Firefox, enter “about:config” at the location bar and press enter. If you are using Firefox 3 then u’ll see a warning page, just click “I’ll be careful, i promise” button.
- U’ll see a lot of record, just right click at the blank place and select “New” -> “Integer”
- Enter “network.dnsCacheExpiration” as the preference name and “0” as the integer value
- Right click and select “New” -> “Integer” again
- This time enter “network.dnsCacheEntries” as preference name and “0” as integer value
- Done, you just disable the firefox dns cache
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Although i don’t try the above solution, but a almost similar Firefox solution not work for me, and came to this solution. worked perfectly for me.
Run this on command prompt:
net stop dnscache
net start dnscache
after executing first 2 lines , issue in FF resolved and site page loaded accurately.
Hi, Thanks for this tip. This a must for web developers!
You can clear the cache I just did it by Tools > Clear Browsing History.
Untick everything except cache. But I think this will mean websites will re-download stuff again.
The about:config fix was so simple, but it doesn’t seem to work. Running 3.6.8 on Linux/x86 (Gentoo) and even after a restart of firefox it’s still caching old entries from /etc/hosts even though I can no longer ping them. Perhaps I did something wrong, although the process was pretty straightforward.
Incidentally, to get out my frustration, I want to say that I hate the fact that firefox caches DNS entries. I don’t think it used to, and now that it does it causes me a headache every day. Why does a browser need to cache DNS anyway? The vast majority of people already have a DNS cache on their computer.
Hey, works great! I managed to flush my DNS cache no problem with this, but do you know how to remove the key after I’ve used it? I’d rather not give it a value so my cache doesn’t flush, but all I could do is reset to string :/