accept_insecure_certs
indicates whether untrusted and self-signed TLS certificates are implicitly trusted on navigation for the
duration of the session.
browser_name
returns the browsers name. For example 'firefox'
browser_version
returns the version of firefox <https://firefox.com/>
enumerate
This method returns a list of strings describing the capabilities that this version of Firefox supports.
moz_accessibility_checks
returns the current accessibility (a11y) value
moz_build_id
returns the Firefox BuildId <https://developer.mozilla.org/en-US/docs/Web/API/Navigator/buildID>
moz_headless
returns whether the browser is running in headless mode
moz_process_id
returns the process id belonging to the browser
moz_profile
returns the directory that contains the browsers profile
moz_shutdown_timeout
returns the value of moz:shutdownTimeout <https://github.com/mozilla/gecko-
dev/commit/7aad85995b21bdaf440dc9dad35c5769a35e90eb#diff-48053ba06cc33be0efb2d7256a1affd9> (aka the value
of config toolkit.asyncshutdown.crash_timeout)
moz_use_non_spec_compliant_pointer_origin
returns a boolean value to indicate how the pointer origin for an action command will be calculated.
With Firefox 59 the calculation will be based on the requirements by the WebDriver specification. This
means that the pointer origin is no longer computed based on the top and left position of the referenced
element, but on the in-view center point.
To temporarily disable the WebDriver conformant behavior use 0 as value for this capability.
Please note that this capability exists only temporarily, and that it will be removed once all Selenium
bindings can handle the new behavior.
moz_webdriver_click
returns a boolean value to indicate which kind of interactability checks to run when performing a click
or sending keys to an elements. For Firefoxen prior to version 58.0 some legacy code as imported from an
older version of FirefoxDriver was in use.
With Firefox 58 the interactability checks as required by the WebDriver specification are enabled by
default. This means geckodriver will additionally check if an element is obscured by another when
clicking, and if an element is focusable for sending keys.
Because of this change in behaviour, we are aware that some extra errors could be returned. In most cases
the test in question might have to be updated so it's conform with the new checks. But if the problem is
located in geckodriver, then please raise an issue in the issue tracker.
To temporarily disable the WebDriver conformant checks use 0 as value for this capability.
Please note that this capability exists only temporarily, and that it will be removed once the
interactability checks have been stabilized.
new
accepts a hash as a parameter. Allowed keys are below;
• accept_insecure_certs - Indicates whether untrusted and self-signed TLS certificates are implicitly
trusted on navigation for the duration of the session. Allowed values are 1 or 0. Default is 0.
• moz_accessibility_checks - run a11y checks when clicking elements. Allowed values are 1 or 0.
Default is 0.
• moz_headless - the browser should be started with the -headless option. moz_headless is only
supported in Firefox 56+
• moz_use_non_spec_compliant_pointer_origin - a boolean value to indicate how the pointer origin for an
action command will be calculated.
With Firefox 59 the calculation will be based on the requirements by the WebDriver specification.
This means that the pointer origin is no longer computed based on the top and left position of the
referenced element, but on the in-view center point.
To temporarily disable the WebDriver conformant behavior use 0 as value for this capability.
Please note that this capability exists only temporarily, and that it will be removed once all
Selenium bindings can handle the new behavior.
• moz_webdriver_click - a boolean value to indicate which kind of interactability checks to run when
performing a click or sending keys to an elements. For Firefoxen prior to version 58.0 some legacy
code as imported from an older version of FirefoxDriver was in use.
With Firefox 58 the interactability checks as required by the WebDriver specification are enabled by
default. This means geckodriver will additionally check if an element is obscured by another when
clicking, and if an element is focusable for sending keys.
Because of this change in behaviour, we are aware that some extra errors could be returned. In most
cases the test in question might have to be updated so it's conform with the new checks. But if the
problem is located in geckodriver, then please raise an issue in the issue tracker.
To temporarily disable the WebDriver conformant checks use 0 as value for this capability.
Please note that this capability exists only temporarily, and that it will be removed once the
interactability checks have been stabilized.
• page_load_strategy - defines the page load strategy for the upcoming browser session.
• proxy - describes the proxy setup for the upcoming browser session.
• strict_file_interactability - a boolean value to indicate if interactability checks will be applied
to <input type=file>. Allowed values are 1 or 0. Default is 0.
• timeouts - describes the timeouts imposed on certain session operations.
• unhandled_prompt_behavior - defines what firefox should do on encountering a user prompt
<https://html.spec.whatwg.org/#user-prompts>. There are a range of allowed values
<https://w3c.github.io/webdriver/#dfn-user-prompt-handler>, including "dismiss", "accept", "dismiss
and notify", "accept and notify" and "ignore".
This method returns a new capabilities object.
page_load_strategy
returns the page load strategy <https://w3c.github.io/webdriver/#dfn-table-of-page-load-strategies> to
use for the duration of the session. The page load strategy corresponds to the readyState
<https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState#Values> and may be one of the
following values;
• normal - Wait for the document and all sub-resources have finished loading. The corresponding
readyState <https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState#Values> is
"complete". The load <https://developer.mozilla.org/en-US/docs/Web/Events/load> event is about to
fire. This strategy is the default value.
• eager - Wait for the document to have finished loading and have been parsed. Sub-resources such as
images, stylesheets and frames are still loading. The corresponding readyState
<https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState#Values> is "interactive".
• none - return immediately after starting navigation. The corresponding readyState
<https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState#Values> is "loading".
platform_name
returns the operating system name. For example 'linux', 'darwin' or 'windows_nt'.
proxy
returns the current proxy object
platform_version
returns the operation system version. For example '4.14.11-300.fc27.x86_64', '17.3.0' or '10.0'
rotatable
does this version of firefox <https://firefox.com> have a rotatable screen such as Android Fennec.
set_window_rect
returns true if Firefox fully supports setWindowRect <https://w3c.github.io/webdriver/#dfn-window-
dimensioning-positioning>, otherwise it returns false.
strict_file_interactability
returns the current value of strictFileInteractability <https://w3c.github.io/webdriver/#dfn-strict-file-
interactability>
timeouts
returns the current timeouts object
unhandled_prompt_behavior
returns the current value of unhandledPromptBehavior <https://w3c.github.io/webdriver/#dfn-user-prompt-
handler>.
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