Fake Firefox update keeps popping up

[ScreamingStrat]

I keep getting this urgent request to update my version of firefox which is what prompted me to download antispyware.   After running a scan or whatever you call it I thought it would fix this problem but it still comes up, please give this non-technical person some advice.  thx

[GuiltySpark]

Hi ScreamingStrat

What version of FF are you currently on?

What Operating System?

[ScreamingStrat]

43.0.4 on XP.   When the fake update first came up I did try to download it but canceled it early on, because I remembered that Firefox updates automatically. 

[GuiltySpark]

As I haven't used XP or FF in a long time I have no idea if support is still going however you could try a manual update to see if there are still updates to go through https://support.mozilla.org/en-US/kb/update-firefox-latest-version

Remember the issue soon with all browsers on XP is they will no longer be able to access most sites due to new protocols.