Flash problem persists after 6 months...does this new information help?

Hi All!

I posted my problem almost 6 months ago, (I'll paste some of the info below to bring you up to date), but I STILL can't access only FOUR sites because I get a "Plugin file is missing" error, (after my previous post I found 2 other sites).  I've been trying to solve this problem off & on, but I got more dedicated the other day because I'll be needing access to these sites very soon.  I found some new information today that I hope will solve this awful problem; however, since I'm not very technically inclined I know I have to ask a "Flash Expert", so here goes....

I run Windows 8 & I use Mozilla exclusively.  I updated Flash the other day to version 15.0.0.152 & I wanted to make sure the plugins had been updated, so I opened the "Flash Player Settings Manager" & under the "Advanced" tab it lists:

                                        NPAPI Plugin Version 15.0.0.152

                                        PPAPI Plugin Version Not installed

Is it significant that the PPAPI Plugin is "Not installed", or does Mozilla only require the NPAPI plugin? 

My second question regards the installation of Flash.  I know that when a program is problematic, it sometimes helps to uninstall & reinstall it...I recently had a game that went nuts & that's the procedure I had to do.  Also, someone on Mozilla's forum said they were having a Flash issue & they went to your site & downloaded the .exe AND the .msi Installers from the Distribution Page, then manually installed them & their problem was resolved.  Would this help me resolve MY Flash problem?  If you think it's worth a try, do I have to uninstall Flash first?

Well, that's all the new info I have.  I have to figure this out before December because that's when the nest-cam comes back on...I really have to get this problem fixed!  I'll paste my previous post below, but I hope the uninstall/reinstall method will be the answer!

Thanks in advance for your help!

Best Regards,

DogPal

Here's my previous post:

Flash 13.0.0.214 does NOT work on some sites, but works fine on all others in Using Flash Player

Hi!

I watch several wildlife nest-cams every day running Windows 8 using Firefox 29.0.1, but yesterday morning, (after I'd already watched the 6 cams I view every day), I started getting a solid, black screen with, "Error loading plugin: Plugin file not found", on TWO of these sites.

My attempts to resolve the problem were:

1.  Checked all the other web-cam sites I view daily, and there's only a problem on 2 of them.

2.  Went to You Tube, Facebook & other similar sites and I can view streaming media.

3.  Refreshed pages-when that didn't help, I closed & reopened Firefox & still 2 sites with "plugin loading error"

4.  Completely shut-down my laptop & rebooted.

5.  Did "System Restore" to earlier in the day when ALL web-cam sites were working.

6.  Went to Adobe Flash site & verified that I had the most current version...I do, & I saw the animations on Flash site.

7.  Verified my Flash Plugins in Firefox...AGAIN...they're all activated & up-to-date

8.  Checked & re-checked ALL the web-cam sites I view every day, (for, at least the 10th time), and the

     same 2 sites are still showing the "Error loading plugin: Plugin file not found" on a black screen.  Even

     though the video isn't seen the "chat" area is functioning, (I don't know if that's important, but I

     thought I should mention it).

9.  I posted the issue on Firefox's Forum but no one has an answer since Flash works everywhere except

     for 2 sites.

I've tried everything I can think of to troubleshoot this, but as you can see, I've had no success in solving this "mystery".

As for the 2 sites I can't view, they are: 

                                    http://www.pixcontroller.com/eagles/    And

                                    http://www.westmorelandconservancy.org/BlueBirdWebcam-1.htm

I've been watching these sites for MONTHS, so why I can't view them all of a sudden, well, I'm clueless, (I guess you already figured that out...ha ha ha).  I was watching the 2 sites listed above early yesterday morning, then when I looked at one of the other cams I view and came back to these 2 sites, I got the "error message".

I hope you have a solution for me, as I'm desperate!  I'm WAY behind in my documentation for these 2 sites, so hopefully you'll have an easy answer.  If it's a technical thing, please use LOTS of details, as I'm not very technically inclined.

Thanks in advance for your help!

Best Regards,

DogPal 

P.S.  I just checked on another site that offers many different wildlife cams, & I CAN view the "Pittsburgh Bald Eagles" if I go through: http://www.ustream.tv/channel/pittsburgh-bald-eagles    I'm sure this means something, but since I don't understand this technical stuff I don't know what that is!  (I told you I'm clueless!)