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Sean McDunn

4 Years Ago

Firefox Malware Warning - How To Fix

For those who are still occasionally seeing a malware warning in Firefox, here's how to fix it:

1. In Firefox, click on the orange Firefox bar at the top left. Then move your mouse over "Help"... then click on "Troubleshooting Information".
2. That will bring up a new page in your browser. On that new page, click on the button on the right that says "Reset Firefox".

That will do it. The malware warning will disappear.

I have been testing with Firefox all weekend. Here's what's been happening.

1. If you visited FAA on Friday night (U.S. Time) when Google had us on their blacklist, then you saw a malware warning in your browser. All browsers were showing the warning (i.e. Chrome, Firefox, Safari, etc.)

2. We were removed from the blacklist later that same night. At that point, all of the browsers removed the warning, as well.

3. For some reason, Firefox has been intermittently displaying the warning ever since, even though FAA is clean and we're not on the Google blacklist.

4. The intermittent warning is only affecting Firefox, and it's only affecting Firefox users who happened to visit FAA on Friday night when we were on the blacklist. It's not affecting new visitors, at all. Our traffic levels are as high as they always are. Sunday, for example, was our best Sunday in the history of FAA in terms of traffic.

It seems as though Firefox may have downloaded some file when we were on the blacklist, and that file keeps telling it that FAA is dangerous, even though we're not.

By clicking on the link, above, and reseting Firefox, you're getting rid of that file. At that point, everything works correctly.


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Christine Till

4 Years Ago

Thanks for the update, Sean.

Unfortunately the new browser page that comes up after I click "Troubleshooting Information" does not have a "Reset Firefox" button on the right or elsewhere. :-(
That may just go for me, but I wouldn't know why ... I'll figure it out eventually.


Andrew Fare

4 Years Ago

It says it will "try" and save all my bookmarks, etc if I reset. I would be loathe to lose all my bookmarks. Has anyone tried this and kept/lost their bookmarks. Will this eventually resolve itself if I do nothing?


Shawna Rowe

4 Years Ago

What about add-ons as well, will they be lost?


Dan Carmichael

4 Years Ago

Info that may help:


Mozilla article:

Personally, I would go into FF first to try clearing cache and clearing (specifically) cookies associated with FAA before I did a global reset.


Karin Kuhlmann

4 Years Ago

It may also help only to delete the "Web Chronicle" + all cookies


Kendall Kessler

4 Years Ago

Thanks you so much! I am still getting the warning so I will follow the directions to get rid of it!


I'll proceed, very cautiously. Opening that FireFox Reset page just caused my browser to crash, immediately, which I don't think has happened in years.

When I restarted FF, neither the Reset page tab or my FAA tab was recovered. Also, I'm concerned about what else will go away if I reset. My FF is highly customized (both bookmarks and add-ons) and I'm not looking forward to rebuilding.

I scoured my PC on Saturday, and again this morning, using two different utilities to clean caches, logs, cookies, etc., and I'm still seeing the Attack Site warning -- but, only when I visit FAA.


Andrew Fare

4 Years Ago

Thanks Wendy. I think I'll pass on the reset. I can live with the intermittent warnings if it's temporary so the big question now is, will it eventually go away by itself.


If using ff I strongly suggest the XMarks addon

Keeps bookmarks, passwords etc


Barbara Griffin

4 Years Ago

If I had seen your post about the XMarks addon, I would not have lost all my passwords! So I reset Firefox but couldn't remember passwords including my password to LastPass, so I had to reset all.

Thanks for the info, Sean. Hopefully we won't need it anymore.


Oh Barbara, I am sorry. What a pain. Make sure you get it now, or set up you ff sync in your options


Shawna Rowe

4 Years Ago

Here's what I did: went to tools--options--security--I have block reported attack sites checked, under exceptions add FAAs website address and it should be fixed. So far so good.


Shana Rowe Jackson

4 Years Ago

Thanks Sean!! Worked like a charm!!


How do I get Xmarks add-on please? And do I use it before doing the ff fix?


And........does this notice have an explanation????? I asked but didn't get an answer. What IS this ? Hasn't happened again because I turned of ffx thingy. But maybe it's a clue for you, Sean.

ivian ANDERSON - 12/16/2012 08:49 PM:

Warning: mysql_numrows() expects parameter 1 to be resource, boolean given in /var/www/vhosts/ on line 239

Warning: mysql_numrows() expects parameter 1 to be resource, boolean given in /var/www/vhosts/ on line 333

Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in /var/www/vhosts/ on line 335

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/ in /var/www/vhosts/ on line 455


Robert Kernodle

4 Years Ago

Again, I have used Firefox all along, during this whole period about which you are discussing, and never once have I seen any warnings whatsoever.

How is this possible?


Richard Rizzo

4 Years Ago

Thank you Sean.


Robert, it can depends greatlyon the addons oyu have on and plugins. Also the anti virus you use which adds onto the browser




Before you remove, Just save your bookmarks and passwords


A M Johnson

4 Years Ago

@Vivian ANDERSON, Those PHP/DB errors are usually caused by typo's when someone is editing site files live. THe last one is very familiar to me, in PHP files if you have an unintended space before or after a file it will throw an error like that.

When I see those errors, I assume Sean is working on the site and when he catches the typo he will correct it immediately. It's common and no big deal. I do it all the time.


Thanks so much AM and Beth..........have got that now, Beth. But, during all this, the whole page here is just too small for me now, to read.........I don't know how to increase the whole page and/or the font the way I can in google to 125++%........sorry.........the vision is failing and this is tough for me........I looked for ffx settings, can't find them. Any ideas? Then I'll be ok again. Cheers.


Whew. Thanks in advance. I found the fix for enlarging the page , via View,Zoom.....can see clearly now........(good song,too)..Cheers.


It turns out that I didn't click "allow sites to use their colours,etc" in ffx settings (options).....that's why I lost all the faa attributes, nothing to do with red alert, how amazing ! All fixed now.


Penny Hunt

4 Years Ago

Thank you Sean, it worked and saved everything!


Andrew Fare

4 Years Ago

For anyone on Firefox worried about losing all their bookmarks, passwords, etc. you can also go to 'Set Up Sync" under 'tools'. A copy of all bookmarks, etc. will be saved at the Firefox server and they can also be instantly transferred to any other device on your network.


Thanks Sean.....worked like a charm


Christine Till

4 Years Ago

I wonder why I don't get the "Reset Firefox" button.

Which version are you running?


Heather Applegate

4 Years Ago

And it struck again on Firefox just now... but I just hit ignore. Don't want to reset to defaults.
Maybe it would be wise to send out a blast email with information about the attack message (and instruction to ignore it) since most (esp customers) will not bypass it and not see this forum.


ffx ....@Christine.................17.0.1


Deborah Benoit

4 Years Ago

Thanks Sean!!


Christine Till

4 Years Ago

Oh!! I'm still at 12.0.
Time to update ....

Thanks a ton Vivian. :-)


Thomas Schoeller

4 Years Ago


I've been clicking on the ignore option...not risking losing any saved bookmarks


Andrew Fare

4 Years Ago

^ Thomas; Go to 'Tools' 'Set Up Sync". A copy of all bookmarks, etc. will be saved on Firefox's server and you can instantly transfer them to another device if you like. I reset Firefox earler today and didn't lose anything.


Thomas Schoeller

4 Years Ago

Before it became too late this evening I decided to do a log-on just to see what Firefox would do. Despite not following through on the Firefox reset I did not (this time) get the dreaded attack site warning. Not sure why it didn't but I'll go with it :)


Liz Vernand

4 Years Ago

I just did the reset and all worked fine. I didn't lose bookmarks or passwords. I'm on Firefox on my Mac. Whew! And the warning has gone away. Keeping fingers crossed!


Joseph Tese

4 Years Ago

Tried Shaun's suggestion. After closing browser and restarting still receive: This web page at has been reported as an attack page and has been blocked based on your security preferences. With Firefox only.


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