You can't modify it via perl, since then all pages will give you the same result. You have to test for the history length via javascript, and then modify the links.

edit: this does sound like an XY problem. Depending on what you want to achieve, there may be better options.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^5: Finding out Browser History Length by Joost
in thread Finding out Browser History Length by user2000

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