User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:76.0) Gecko/20100101 Firefox/76.0
Steps to reproduce:
- Start Firefox by clicking on the desktop icon
- Press Cmd+N (or Ctrl+N for Windows users) to open a new browser window
- Search for a PDF file via the search bar in Firefox
- Open the PDF file by clicking on the link
Upon opening the PDF file, Firefox begins to spam new tabs continuously and the user is unable to exit the browser without force quitting. In addition, the tabs produced have no content at all.
At times, after the user force quits, the background image of the desktop completely disappears along with the time, WIFI icons, etc. located at the top right of the screen. As the user restarts their Firefox browser, they are greeted with a message which says, "Sorry. We're having trouble getting your pages back." and the user has to either restore or start a new session. This shows the main issue regarding the perpetual spam of new tabs upon opening a PDF file in Firefox, but it seems as if the black background and the computer freezing issue only occurs at times and at other times, doesn't. The issue demonstrated also affected the Finder and any other applications of the Macbook since they all froze and I wasn't able to move any applications at all.
Device used: 2012 Macbook Air
Expected Result: Upon opening the PDF file, the file should have been successfully opened without spamming multiple tabs and the user should still have the ability to interact with the computer.