With ABP, that number more than doubles, to 417 MiB.Īn even more extreme example is this page, which contains over 400 iframes. For example, if I load TechCrunch and roll over the social buttons on every story, without ABP, Firefox uses about 194 MiB of physical memory. Many pages have multiple iframes, so this can add up quickly. Second, there’s an overhead of about 4 MiB per iframe, which is mostly due to ABP injecting a giant stylesheet into every iframe. This appears to be mostly due to additional JavaScript memory usage, though there’s also some due to extra layout memory. The most important part was the following.įirst, there’s a constant overhead just from enabling ABP of something like 60–70 MiB. Last year I wrote about AdBlock Plus’s effect on Firefox’s memory usage.
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