Why got Firebug removed after updating Firefox to version 50?

Question

After updating Firefox to version 50.0 my Firebug opens the default developer tools. The original Firebug doesn\'t work anymore.

I have always preferred Firebug as m

Answer 1

You can also go on Help -> Troubleshooting Information -> Refresh Firefox and install Firebug through http://addons.mozilla.org/

Answer 2

Uninstall Firefox completely including deleting the Mozilla folder within your APPDATA.

Then reinstall Firefox and add both Firebug and FireQuery.

After that everything should work as before.

Answer 3

First remove new version of "firebug" and download old version of "Firebug(2.0.17)" from following URL:

https://addons.mozilla.org/en-US/firefox/addon/firebug/versions/

Answer 4

Firebug does not work anymore once multi-process Firefox (separate processes for the Firefox UI and the websites) is enabled. See the related post in the Firebug blog.

You may be able to reenable Firebug by setting the preferences browser.tabs.remote.autostart, browser.tabs.remote.autostart.1 and browser.tabs.remote.autostart.2 to false via about:config. Though at some point this preference will be removed.

So, you are advised to use the Firefox DevTools instead. I am writing a migration guide on MDN. Firebug features that are not in the DevTools are covered in a Firefox bug.

Answer 5

For all the folks out there, there is a good news..!! Firebug works great on these two Mozilla based browsers.

Cyberfox & Palemoon

Both are forks of forefox that uses code before the implementation multi-process. Cyberfox uses the more recent code fork compared to Palemoon.

Both browsers are well maintained and updated regularly.

Cyberfox announced its death on March 2017 but its still actively maintained [as of Dec 2017] and I still get update.

Both browsers support cross platform windows / Linux, on Linux you should have 64 bit distro to use cyberfox. Palemoon on the other hand works great on both the bits.