Firefox is blocking Flash by default

After a number of issues and exploits have been discovered recently, Mozilla has taken a big step and is now blocking Flash in all of its Firefox browsers.

Flash, the much maligned and hated software on which a surprisingly big part of the web still relies, has often been criticized for its faulty security. More recently, unpatched vulnerabilities, which are being exploited in the wild, have transformed Adobe’s platform into an even bigger liability.

But you’re a bit safer if you rely on Firefox, as Mozilla has put Flash on its blacklist of software and addons. The program is disabled by default and can only be enabled if the user clicks on a prompt that pops up. The reasoning here is that Flash needn’t be blocked completely, but it shouldn't be running without the user’s knowledge either.

Read more: After Facebook called for its death, now Firefox is blocking Flash by default
 
Those using Internet Explorer can accomplish the same thing by turning on ActiveX Filtering via Tools > Safety (at least this works with IE 9 under Vista). You can then turn off filtering for specific websites via blue button on the address bar. Interestingly, Flash is no longer essential for watching YouTube videos, although IE 9 has plenty of webpage display problems on YouTube.
 

My Computer

System One

  • Operating System
    Vista Home Premium x86 SP2
    Manufacturer/Model
    HP Pavilion Elite m9150f
    CPU
    Intel Q6600
    Memory
    3 GB
    Graphics Card(s)
    NVIDIA GeForce 8500 GT
I found a solution. Open up about:config on Firefox. Find and double click on extensions.blocklist.detailsURL & extensions.blocklist.url and clear the default value. Now go find the blocklist.xml and rename it or delete it. I've just now changed the second value so I'll see if it is still blocked tomorrow.
 

My Computers

System One System Two

  • Operating System
    Windows 8.1 Industry Pro x64
    Manufacturer/Model
    HP Pavillion Elite HPE-250f
    CPU
    Intel i7 860 Quad core 2.8 ghz
    Memory
    8 gb
    Graphics Card(s)
    ATI Radeon HD 5770 1 gb ram
    Monitor(s) Displays
    Alienware 25 AW2521HF
    Screen Resolution
    1920x1080 &1680x1050
    Hard Drives
    1 TB x2
    Other Info
    https://www.cnet.com/products/hp-pavilion-elite-hpe-250f/
  • Operating System
    Windows 2012 R2 Data center/Linux Mint
    Manufacturer/Model
    Dell Poweredge T140
    CPU
    i3 9100 3.6GHz, 8M cache, 4C/4T
    Memory
    8GB 2666MT/s DDR4 ECC UDIMM
    Screen Resolution
    1680x1050
    Hard Drives
    1 TB & 360 GB x2
    Other Info
    https://www.dell.com/en-us/work/shop/productdetailstxn/poweredge-t140?~ck=bt
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