Firefox self-updated recently to v. 47 and I cannot run cucumber tests anymore.
Running bundle exec cucumber opens Firefox which crashes with the following dialog message:
Firefox quit unexpectedly. Click Reopen to open the application again. Click Report to see more detailed information and send a report to Apple.
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Duplicate | None | T138095 Cucumber tests won't run locally on firefox 47 | |||
| Resolved | zeljkofilipin | T137561 Firefox v47 breaks mediawiki_selenium | |||
| Declined | None | T137540 Update mediawiki_selenium to use Marionette | |||
| Declined | None | T137797 Create a Debian package for https://github.com/mozilla/geckodriver for at least Debian Jessie |
Yeah we have hit that last week or so on the CI infrastructure (which autoupdates the browsers). See T137561
The Firefox v47 release has a bug with WebDriver which causes it to crash Firefox. The last news is that there might be a patch upstream to fix it up in a future v47 release. Apparently Mozilla is going to phase out support of the WebDriver protocol in favor of a system they have named Marionette.
To be able to run WebDriver based utilities (such as our Selenium system), Mozilla wrote a proxy which translates the commands from WebDriver to Marionette. It is still experimental though and does not fully cover all of WebDriver. That makes me believe there will be a proper fix in v47.1 or v48.
The proxy is a rust application available from https://github.com/mozilla/geckodriver . The Selenium glue has to spawn it and pass all command through it to drive Firefox. Our mediawiki_selenium is going to be adjusted to recognize geckodriver T137540. For CI we need geckodriver to be packaged and shipped on the Jenkins slaves T137797.