The firefox addon link gives me a 404 and I can not find the extension on the Firefox add on site manually.
@jbaxleyiii is Firefox addon supported or is development and testing occurring on the master branch?
What is the status of supporting Firefox?
Still broken! :/
Until this is resolved, you can of course build the extension locally from this repo and install it on Firefox
git clone https://github.com/apollographql/apollo-client-devtools.git
cd apollo-client-devtools/
npm i
npm run build
Open "about:debugging" in Firefox, click "Load Temporary Add-on" and select the manifest.json in shells/webextension/.
Refresh the page you need to debug, and voila:

Not ideal, since you need to leave the "about:debugging" tab open, but hey it works. 🤷♂️
Still no update? May as well switch to chrome until the firefox dev tools are working again.
i've just gone back to firefox and i'm enjoying the experience.... really need this extension tho.
So is Firefox supported or not? This issue has been open for 8 months(!) and the readme is still pointing to a deleted add-on page (https://addons.mozilla.org/en-US/firefox/addon/apollo-developer-tools/)
Please see https://github.com/apollographql/apollo-client-devtools/issues/73#issuecomment-444497422. In a nutshell - devtools supports FF, but has been pulled by FF. We're working on a fix, and will track all progress in #73. Thanks!
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So is Firefox supported or not? This issue has been open for 8 months(!) and the readme is still pointing to a deleted add-on page (https://addons.mozilla.org/en-US/firefox/addon/apollo-developer-tools/)