fýr-tor
This might be just a supplemental entry substituting part of an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
fýr-tor
For Cot. 93 substitute Farus, beácanstán, in promontoria rupis posita, i. fýrtor, Wrt. Voc. ii. 76, 14. Farus, Grecum est nomen, nam fos, lux, oros autem visio, apud eos notninatur, hinc compositum nomen est fari, id est fýrtor, 39, 64.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.