The collaboration between the developers of the Brave browser and the archive.org project has paid off. Beginning with version 1.4 The desktop version of Brave will open pages from the Wayback Machine archive that are inaccessible for any reason.
Reportedthat now Brave pays special attention to 14 HTTP error codes, in addition to the classical 404, including: 408, 410, 451, 500, 502, 503, 504, 509, 520, 521, 523, 524, 525 and 526. Having discovered one of these problems, the browser will prompt the user to download an archive copy of an inaccessible page with one click.
Wayback Machine developers write that over the 23 years of the project’s existence, more than 900 billion URLs and more than 400 billion web pages have been archived. And this archive is replenished every day with hundreds of millions of new archived URLs. That is, archive.org most likely has archived versions of most of the “missing” pages that the user may encounter.
The developers also remind that the functionality of the Wayback Machine can be added to other browsers: 404 error detection and display of archive URLs are available through special browser extensions Safari, Chrome and Firefox.