![]() Further, the rules which made up the filters were applied at different stages of page loading.įor example, rules could have been triggered before the browser sends the request: within the onBeforeRequest event, the browser asked the extension what to do with a particular request, and the extension reacted dynamically by blocking or redirecting it. Declarative rulesīefore Manifest V3 was introduced, the filtering engine was dynamically built from filters downloaded from the server by the extension. If you're not a techie, you can feel free to skip this part. The further description of the problems includes a lot of details, mostly understandable to developers. But don't forget the 5000 rule limit on all custom filters and user rules. Of course, you can still set your own filter manually. After all, blockers must use pre-set filters (no more than 50), and we have to be very selective about which filters will be available to users. Now it is much more difficult to accomplish this. Previously, anyone could create a filter for themselves, and over time such a filter could become popular and get on the list of recommended blockers. Manifest V3's restrictions harm not only filtering quality and user experience, but also the filter development community. Notifications about exceeding the limit will look this way: If this limit is exceeded, AdGuard MV3 will only be able to apply the first 5,000 rules and the rest will remain inactive. Then the user would be left without AdGuard protection.Īll of these cases are envisaged by us and are displayed on a separate screen with a description of what the browser has disabled and what it has left enabled.įor dynamic rules, within which users can add their own rules or filters, there is a tiny limit of 5,000, including the limit of 1,000 regexp rules. In the worst case, even the basic filter might not be enabled, because it contains more than 30,000 rules. ![]() after an update, service worker restart, change of filter set in our or third-party blockers), it will show a message saying that the browser has modified the list of active filters and left only AdGuard basic ad filter enabled. If this occurs with our extension (and this can happen at any time, e.g. The trick is that one extension may get all of the allowed amount of rules, or there may be more than one, and then perhaps some of the extensions will fall short of the limit. If you don't know what filtering rules are and how ad blocking works in general, or if you'd like to refresh your knowledge, visit our Knowledge base for a brief explanation.Īll the rules included in the extension filters were divided by Manifest V3 into static (built-in) and dynamic rules and their number was drastically limited.įor static rules, Chrome set a minimum guaranteed limit of 30,000 rules per extension and a total limit of 330,000 rules for all extensions installed by a single user (this also takes into account the limit of 1,000 regexp rules per extension). Here's a short video that shows how it works Rule limits Meanwhile, if you want to try it, you can install it from Chrome WebStore. We will talk about each of them in detail. While developing the prototype, we faced a lot of serious problems caused by the features of the new API: some of them we managed to overcome, and some we had to reconcile with. But we coped with it, of course, and proved that ad blockers will survive even after the apocalypse that is Manifest V3. The task was not an easy one: the new API was still raw, some aspects were being finalized and did not work as intended. In mid-2021, we started working on the prototype of a new extension that would be able to block ads even within the strict limits of Manifest V3. Experimental AdGuard MV3 Browser extension These products are not limited by any browser.įortunately, we're ready for it. ![]() If you're using AdGuard for Windows, Mac or Android, you should not worry about MV3 at all. The last phase of the launch will come very soon: starting in January 2023, all extensions on Manifest V2 will stop working, even those that were added to Chrome Web Store earlier. ![]() Since January 2022, it became impossible to add new extensions based on Manifest V2 to the Chrome Web Store. We didn't stand aside either and published several articles describing the possible negative consequences of Manifest V3 implementation and even expressed hope that "things won't turn out so badly".ĭespite the public outcry, Manifest V3 became available in late 2020 along with Chrome 88 Beta. In 2018, when Google first released a document describing the new API, the developer community erupted in criticism. The wave of Manifest V3 has been building gradually but inexorably. It's now the new reality in which dozens of ad-blocking extensions, including the AdGuard Browser extension, will ( or won't) work. Manifest V3, Chrome's new extension API, is no longer an illusory threat.
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