Firefox Community Forum

I'm using 107.0.1 vers. At this link it states: https://support.mozilla.org/en-US/kb/view-pdf-files-firefox-or-choose-another-viewer#w_use-a-different-pdf-viewer-for-downloaded-pdf-files

Disable the built-in PDF viewer and use another viewer

You can also set a different third-party PDF viewer to handle PDF files, instead of Firefox’s built-in PDF viewer. To switch from using the built-in PDF viewer to another viewer: 1. Click the menu button and select . 2. In the panel, go down to the Applications section. (SO WHERE IN THE HELL IS THIS SECTION???) YOU CAN'T DO I never selected Mozilla to open any pdf and there's no where to opt out or change based on what all the troubleshooting tips say... All these tips must be located on a much older version of Firefox cause they ain't in my version OR they are hid under some dubious section... Pretty frustrating....when you want to use Adobe and can't cause I'm locked in under Firefox....don't know how that has happened unless it was done automatically under one of the many current upgrades that have been coming down over the last month.

I have had 2 sites produce this error box in place of the target Web Site (See Picture). I have read previous topics about this and have followed the instructions with no positive results. FYI, clearing the web site's cookies, clearing Cache and disabling Hardware acceleration.

The first was https://www.walmart.com. After leaving a "Feedback" 2 weeks ago it appears as if they were able to fix the problem. However, the site is not as important as my Medicare PPO provider. I tried loading previous versions of Firefox, but that did not help.

In both instances the LOL "support" people's response was to try a different Browser. So, I reluctantly loaded Google Chrome and it worked perfectly. From my perspective, this eliminates everything to do with my machine setup.

Below is the sign-on URL (not unique to me). Please note that this 668 character URL has not changed for over a year. It is just Aetna's adoption of the Imperva Security Firewall. Both my Winders 8.1 and Winders 10 machines produce the identical results.

https://www.aetna.com/AccountManagerV3/v/login?identityTransaction=VIhzS3Xx1ogw4rzQY5lXUvDYBtXFZiXttegdT9ffK%2FOZ8oTHnKbryvfgfagvpO0aknHiEN2hnELOIkjfz3eJNeBfKQ%2FUDo0hSJHhjsdZdJw0rkVj%2BFjAVYypzW5kRH%2FzzOlbxrN6KKpjWvagusMp%2BzwgQqvg5xvUkwLCs3MlD%2BkzHOTVKlu4GYxJgmzr3Y9NUdFGUI9PHurN4QxSyvXxNjJ4jSSL4NHuctvtQyV1fUh%2FOqpHJglcALQuuNeyQ1QncyKPZJYf5rj1DLC2zrxKX0VgVWQZfSbw5Pouiv%2FWfwWxArHPHcV5cXr3kI2j33C8dUl0Jdup0nvdVs%2Bxigzp%2BmMQUaHxaw3B7tiJ7eokyNMgvG4V5SPw9FL5j3mhwBAirx%2BmX7Yj0qDZZNRl8z1WcvHen8HwsDijtH4Sg%2FNdsuzhXIw8snHF6hUd4n3MbJerO8nRUdzKR%2BhNCNq%2FjeuQWmT1cyQ3QtmIXcL0ab42vk6or1SX5wG%2BIMF%2Bk6ZJQw8h&appname=NAV&branding=&skin=&language=&channel=web