why firefox keeps a secret doubleclick.net traking cookie even when i have all cookies turned off and there is no cookie on the list??
sempre navego com a opcao de cookies desabilitada por completo e faço questao de limpar completamente todos os cookies quando termino o uso de qualquer serviço que exija o uso dos mesmos. porem um teste com o hitmanpro mostra que embora eu esteja com os cookies desabilitados limpos e nao existe nenhum cookie na lista do firefox existe um tracking cookie doubleclick.net armazenado no cookies.sqlite. sendo assim ja nao confio mais no firefox que tem mantido tracking cookies secretos mesmo contra a vontade dos usuarios. fico no aguardo de alguma explicacao da vossa parte diga se de nota que neste exato momento tenho os cookies ativados unicamente porque voces assim o exigem para que possamos postar uma questao
google translate
i always surf with the option of cookies completely disabled and I always clear all cookies when I finish using any service that requires their use. but a test with hitmanpro shows that even though I'm with cookies disabled and there is not any cookie from the list of firefox, there is a tracking cookie stored in cookies.sqlite a doubleclick.net. therefore i do not trust more in firefox who has keeping secret tracking cookies even against the wishes of the users. I'm waiting for some explanation from you
Chosen solution
Check the permissions page to make sure there are no DoubleClick cookies, and that the site does not have permission to set cookies. Here's how:
In the address bar, type or paste about:permissions and pause while Firefox loads the page. In the search box above the list in the left column, type or page doublec and pause while Firefox filters the list. Make sure you have "Block" for everything and you also should see "0" cookies set.
Assuming that is right, after exiting Firefox completely, if there are no persistent cookies you want to save, you could delete cookies.sqlite. Firefox should create an empty one the next time you start Firefox.
If a future scan finds a cookie, could you capture a screen shot of the HitmanPro report? Also, I may ask you to email me your cookies.sqlite database depending on how it appears.
Read this answer in context 👍 1All Replies (4)
Chosen Solution
Check the permissions page to make sure there are no DoubleClick cookies, and that the site does not have permission to set cookies. Here's how:
In the address bar, type or paste about:permissions and pause while Firefox loads the page. In the search box above the list in the left column, type or page doublec and pause while Firefox filters the list. Make sure you have "Block" for everything and you also should see "0" cookies set.
Assuming that is right, after exiting Firefox completely, if there are no persistent cookies you want to save, you could delete cookies.sqlite. Firefox should create an empty one the next time you start Firefox.
If a future scan finds a cookie, could you capture a screen shot of the HitmanPro report? Also, I may ask you to email me your cookies.sqlite database depending on how it appears.
I did as you said. it's okay for now but I will keep observing if it happen again. Thank you very much !!.
Modified by jelias
Thanks for reporting back.
I was thinking earlier today that when you delete a cookie in Firefox, Firefox directs a database engine to delete that row of data, and the database engine modifies the cookies.sqlite file so that Firefox no longer sees that cookie. However, for efficiency, database files are not constantly resized like regular document files; the space is retained to reduce the overhead of requesting space from the operating system. Therefore, some pieces of the cookie may remain in the file until it is cleaned out or overwritten by the database engine. There are some utilities to "vacuum" these database files, which should clean up the unused space. If you see this problem in the future, where a cookie you removed and which is invisible in Firefox can be found using an external utility, it would be interesting to "vacuum" the file instead of deleting it to see that cleans up the cookie crumbs.
You can also check the settings for third-party cookies.
- Tools > Options > Privacy > Firefox will: "Use custom settings for history"
You can set the Boolean pref network.cookie.thirdparty.sessionOnly to true on the about:config page to have third-party cookies act as session cookies.
Note that changing cookie settings won't affect existing cookies, only new cookies will be effected and you need to remove existing cookies.
If you suspect issues with cookies then you can try to delete the cookies.sqlite file.
You should avoid using third-party cleanup programs to remove data from files in the Firefox profile folder to avoid these database files from getting corrupted.