Static filter anchor malfunction.

[scratchyleet]

Requirements:

• Firefox 46.0.1.
• uBlock Origin 1.7.0.

Reproducing steps:

• Set uBlock Origin's static filter to rules below:

||*$image
@@||avatars1.githubusercontent.com/u/12792253^$image,domain=github.com

• Open uBlock Origin logger.
• Open page: Suggestion: Prevent AudioContext fingerprinting #1647
• Watch as an image with the url address https://avatars1.githubusercontent.com/u/12792253?v=3&s=40 is being allowed.
• Change static filter to rules below:

||*$image
@@||avatars1.githubusercontent.com/u/12792253?^$image,domain=github.com

• Open (or reload) page: Suggestion: Prevent AudioContext fingerprinting #1647
• Watch as an image with the url address https://avatars1.githubusercontent.com/u/12792253?v=3&s=40 is being blocked now.

Is that an expected behavior?

Additional information:
It seems when anchor in a static filter rule is stated after digits or letters then everything after anchor is passed. But if anchor is stated after special characters (e.g.: "?", "=") then everything after anchor is not passed. Probably i do not completely understand anchor's role in uBlock's static filter. What does it expected to do?

Good luck fixing that.

[gwarser]

Works as expected https://adblockplus.org/en/filters#separators

[scratchyleet]

Works as expected https://adblockplus.org/en/filters#separators

Then it is not an issue. My apologies.

Interesting though. Is there any difference between static and dynamic filters?
I have tended to think that dynamic filter allows string+anything after that. But now i see that static filter acts the same? Shouldn't it be an address explicit by default?

For example:
I would like to allow: https://avatars1.githubusercontent.com/u/12792253
But not: https://avatars1.githubusercontent.com/u/12792253?v=3&s=40
If i place a rule:
@@||https://avatars1.githubusercontent.com/u/12792253
in a static filter then https://avatars1.githubusercontent.com/u/12792253?v=3&s=40 would be also allowed.
Though i have found a solution in the given link above:
@@||https://avatars1.githubusercontent.com/u/12792253|
Is that correct?

Also i would like to ask about pipes ("|", "||").
What is the difference between:

|https://avatars1.githubusercontent.com
||https://avatars1.githubusercontent.com

I couldn't understand that part from the given resource.

And i guess double pipes are not used in the end of an address? E.g.:
https://avatars1.githubusercontent.com||

[gorhill]

There is more details here: https://adblockplus.org/filter-cheatsheet.