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The application “Firefox” can’t be opened.

MAC OS 10.11.4 1) when i open firefox - I get this error message - The application “Firefox” can’t be opened. 2) when I try to start firefox in safe-mode same message as… (read more)

MAC OS 10.11.4

1) when i open firefox - I get this error message - The application “Firefox” can’t be opened.

2) when I try to start firefox in safe-mode same message as above

3) when I try to run /Applications/Firefox.app/Contents/MacOS/firefox-bin -P The error message back /Applications/Firefox.app/Contents/MacOS/firefox-bin: Operation not permitted

4) When I trash can the firefox application and reinstall firefox - get the same error message as step 1

5) when I renamed Policies folder and then start firefox same error message as in item 1 above

6) when I trash can the firefox application with profile folder rename - and install firefox same as item 1

7) when I ran step 3 - the profile manger gui came up - then went away. when I ran step 3 again- I get the error in step 3

Please advise my options - I have bookmarks and security information I need to access - I made a copy of the Profiles folder before I started this process.

thanks, dan

Asked by dtiernan 1 year ago

Last reply by jscher2000 1 year ago

  • Archived

How can I start with a total clean slate? Cannot resolve past a certain error message

I originally got a message at the bottom of my hotmail emails that says "Firefox seems...slow...to...start..." and so after ignoring it for awhile, I decided to click it … (read more)

I originally got a message at the bottom of my hotmail emails that says "Firefox seems...slow...to...start..." and so after ignoring it for awhile, I decided to click it because it promised to refresh it. BIG mistake. After doing so, the next thing I remembered was that I could no longer start the application. I work off of a Mac OS 10.11.6, and Firefox has long been my favorite browser. Installing new apps didn't seem to work either, so to troubleshoot this problem I uninstalled the app, restarted my computer and emptied the trash. Then, went through the installation process again. I still get that error message, and Firefox just refuses to start.

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Asked by jodilewis 3 years ago

Last reply by FredMcD 3 years ago

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El Capitan sees Firefox as PowerPC application

After installing Firefox 45.0.1 on 10.11.4, the OS sees the application as a PowerPC application. Starting the application results in the message "You can't open the appl… (read more)

After installing Firefox 45.0.1 on 10.11.4, the OS sees the application as a PowerPC application. Starting the application results in the message "You can't open the application "Firefox" because PowerPC applications are no longer supported."

No idea why the OS sees it as PowerPC since it hasn't been a PPC app for years.

The computer is a Macbook 13" aluminum late 2008, 2.4 GHz Core 2 duo.

Asked by DJHurlbut 4 years ago

Last reply by ideato 4 years ago