dequelabs / dequelabs/axe-core
axe DevTools induces a JS crash on any webpage relying on rollbar.js (error monitoring JS library)
- Dominant language
- JavaScript
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Description
### Product
axe Extension
### Product Version
axe DevTools 4.117.1 (based on axe-core 4.10.3) on Firefox 146.0.1
### Latest Version
- [x] I have tested the issue with the latest version of the product
### Issue Description
#### Expectation
With axe DevTools enabled, I should be able to visit any webpage without inducing a page-wide Javascript crash.
#### Actual
When the visited webpage relies on the [rollbar.js library](https://github.com/rollbar/rollbar.js) ([Rollbar](https://rollbar.com/) seems to be a SaaS error monitoring platform), a crash occurs systematically when visiting with axe DevTools enabled: `Error: Permission denied to access property "_rollbarOldOnError"`
See the linked issuue on the rollbar.js repository: rollbar/rollbar.js#839
#### How to Reproduce
As of December 30, 2025, affected webpages include [wise.com](https://wise.com/) and [the gog.com storefront](https://www.gog.com/). On gog.com, the crash prevents the login form from opening correctly.
Disabling the axe DevTools extension immediately stops the issue.
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Assessment
This issue has not been assessed yet.