Very Odd WiFi connection problems - plus crashes

Since Firefox 2.0.0.9 crashed yesterday, I have had very odd problems with my WiFi (Earthlink through an Apple Airport). Network Diagnostics says everything is okay, but Safari can no longer connect to the internet, and after Firefox crashes I can not even send Apple an error report. Yet I can get online with Firefox, as I am now.
The problem apparently started EITHER when I upgraded to the latest Firefox or when I tried to place an order at <http://www.senacases.com/> (or both). After Firefox crashed multiple times while trying to place an order at <http://www.senacases.com/>, I opened Safari, which would not connect.
I ran Network Diagnostics which said everything is fine. But Firefox continually crashes trying to place an order at <http://www.senacases.com/>, Safari continues not connecting, Network Diagnostics continues to say everything is fine, and now I can't file an Apple Error Report and trying to connect to some of the library services at Notre Dame (something I have always been able to do before), makes Firefox crash.
The only other possible symptom I have noticed is that I could not connect to a Late Show video this morning. Otherwise, I can browse the web in Firefox, I can pick up my email with Entourage, etc.
How do I fix this?

PS: I once had a similar problem that was fixed by a simple restart.
I have restarted numerous times now, with no change. My MacBook was off over night.

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Thank you for reading this and have a great day

Since you are in a hotel, some of these are not applicable.
Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
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Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

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Hey RJS568999,
I found that if you can connect to your Wi-Fi router, but are having issues with webpages loading, sending or receiving email, etc., Apple recommends you use Wireless Diagnostics, included with OS X Mountain Lion v10.8.4 and later.
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About Wireless Diagnostics
http://support.apple.com/kb/HT5606
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Delgadoh

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Menu/Tools/Settings/Connection/Wireless LAN
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I have just experienced this problem having been using the WiFi network for months without problems. I tries all the suggestions on these forums including the power settings, turning off WEP, and the fixed IP suggestion and none worked. I even reinstalled the firmware and reconfigured everything. It turned out to be the router. I had rebooted it several times to no effect but the DHCP always gave the N95 the same IP address lease. So I changed the range of IP addresses the DHCP could lease and restarted the N95. It got a new IP and was back working again.
If at first you don't succeed, try again. Then quit. There's no use being a damn fool about it.
-- W.C. Fields

WiFi connection problem testing

I am also one of many having the intermittent WiFi connection problem at home.
From a technical testing mode. Get the free the "FreePing" application by Marcel Lanz in the app store.
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Hi,
You should be debugging the driver / contact the vendor. Seems like netrtwlanu is realtek based chipset.
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Try this and it should reset your printer. On the front panel press the * and the # key at the same time, then press 1,2,3 in that order on the touch screen touch the left arrow button twice which will take you to the reset menu then press ok. Press the left arrow two more times and it should say "semi-full reset" press ok and this will be performed. The printer should shut down and will have to be turned back on, it will ask you for your language and your country the printer should initialize itself and should print an alignment page. NOTE: any speed dial numbers will be lost when you perform the semi-full reset.
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This starts to happen just several weeks recently.
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Please help. Thanks.

Troubleshooting Wi-Fi issues in OS X
Wireless Connection Problems - Fix
Wireless Connection Problems - Fix (2)
Wireless Connection Problems - Fix (3)
Wireless Connection Problems - Fix (4)
Wireless Diagnostics - About
Also try turning off Bluetooth

Why won't Apple fix the wifi connectivity problem with the iMac and new OS instead of just havin us go through hours of useless mock fixes!

I have spent hours with apple care about this problem with wifi connectivity. According to all the posts I'm not alone. I love my new IMAC
but i'll be glad to go back to my PC just so I can get my email without all the headaches. It seems that Apple has lost interest in
the IMAC and all of the problems associated with the new OS.

Keep in mind that ASC is where people go to get help, so yes, you are seeing reports of people who are having WiFi connection issues. But while it might seem like there are lots of people having trouble, given the sheer number of iMacs in use, it is a very small number. Also keep in mind that WiFi isn't totally under Apple's control. There are dozens of WiFi routers. Even worse, the manufacturers of WiFi routers often release firmware upgrades to fix flaws without ever informing the consumer. And just to add to the confusion, while WiFi 801.2 n routers have been sold for several years, for most of that time there was no agreed upon standard!
So if you'd like help, first, what router do you have and have you checked the vendor site to see that it has the latest firmware?

Very slow wifi connection on my MBP

I'm having problems with my wifi connection on my MBP. My iPad, iPhone and iPod all work absolutely fine but for some reason I have a very slow connection on the MBP. If I connect it to the router with a wire it's fine so it's definitely the wifi.
The only other thing that's changed recently is our Internet package. But this hasn't effected any of my other devices and we actually upgraded our package so I think that's coincidental.
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Thanks in advance

thanks for the tip. unfortunately, removing the security from the router isn't an option as it isn't even my router (my roommate owns it and would never allow that to happen).
the thing that is perplexing is that it hasn't always been slow - this just started happening within the last two weeks. one could assume that if one computer experiences a slow internet connection, the other would as well if they are both going through the same router. secondly, the connection strength, despite it being slow, is at the maximum. finally, if i connect to any other network at school or coffee shop, the connection is fast. there's obviouly something specific to my MBP and the router that the computer doesn't like, which is causing the lag.
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Very Odd WiFi connection problems - plus crashes

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