The point is that a poor regular expression may cause the extension to completely break the browser.
I suggest adding more checks for regular expressions in the filtering rules.
More on catastrophic backtracking and relevant articles:
Instead of static analysis, we may consider checking every regular expression against a few hundreds of random URLs and detect the "slow regexes" this way.
Check this issue: https://github.com/AdguardTeam/AdguardBrowserExtension/issues/2240
The point is that a poor regular expression may cause the extension to completely break the browser. I suggest adding more checks for regular expressions in the filtering rules.
More on catastrophic backtracking and relevant articles:
Instead of static analysis, we may consider checking every regular expression against a few hundreds of random URLs and detect the "slow regexes" this way.