A positive lookbehind would match values not preceded by a minus sign: In the example below a negative lookbehind is used to match a number only if it is not preceded by a minus sign. With its updated RegExp engine, Firefox now supports all new regular expression features introduced in ECMAScript 2018, including the dotAll flag, Unicode property escapes, named capture groups and lookbehind (positive and negative) assertions, which make it possible to find patterns that are (or are not) preceded by another pattern. For developers there's quite a lot more on offer. Mozilla provides a new Extended Support Release for enterprise users once a year and it includes all of the enhancements since the last ESR, in this case Firefox 68, together with the latest features.Īs far as users are concerned, the Protections Dashboard, a screen which shows trackers and scripts that are blocked for improved privacy, is the headline feature of Firefox 78. It only seems like yesterday that we reported Developer Tool Improvements In Firefox 77, but as Firefox 78 is an Extended Support Release (ESR) it merits renewed coverage. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.Firefox 78 - New Extended Support Releaseįirefox 78 includes a new RegExp evaluator, bringing it up to date with the requirements of ECMAScript 2018, and enhanced support for WebAssembly. Mozilla developers Christian Holler and Lars T Hansen reported memory safety bugs present in Firefox 91. #CVE-2021-38494: Memory safety bugs fixed in Firefox 92 Reporter Mozilla developers and community Impact high Description Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1.Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. Mozilla developers Gabriele Svelto and Tyson Smith reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. #CVE-2021-38493: Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1 Reporter Mozilla developers and community Impact high Description Note: Due to a clerical error this advisory was not included in the original announcement, and was added in Feburary 2022. This bug only affects Firefox for Android. This could lead to user confusion and spoofing attacks.
If a domain name contained a RTL character, it would cause the domain to be rendered to the right of the path.
FIREFOX 78 ESR FOR ANDROID
#CVE-2021-4221: Address bar spoofing on Firefox for Android due to RTL characters Reporter Rohan Sharma Impact moderate Description This bug only affects Firefox for Windows. When delegating navigations to the operating system, Firefox would accept the mk scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. #CVE-2021-38492: Navigating to `mk:` URL scheme could load Internet Explorer Reporter James Lee Impact moderate Description Mixed-content checks were unable to analyze opaque origins which led to some mixed content being loaded. #CVE-2021-38491: Mixed-Content-Blocking was unable to check opaque origins Reporter Jonathan Kingston Impact moderate Description #CVE-2021-29993: Handling custom intents could lead to crashes and UI spoofs Reporter Amy Burnett working with Include Security Impact high Descriptionįirefox for Android allowed navigations through the intent:// protocol, which could be used to cause crashes and UI spoofs. Mozilla Foundation Security Advisory 2021-38 Security Vulnerabilities fixed in Firefox 92 Announced SeptemImpact high Products Firefox Fixed in
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